Math Help: How to Work Out a Fraction of a Number

You need to divide by the top and multiply by the bottom.

12 divided by 3 is 4, and 4 times 4 is 16.

You will need to divide 7/10 by 5 3/5.

Convert 5 3/5 into an improper fraction which is 28/5

Now work out 7/10 divide by 28/5 which is the same as 7/10 times.

The answer is 1/8.

Just divide 3.50 by 7 as 1/7 means divide by 7. This will give an anwer of 0.5.

It might be easier to convert 18.52 million to an ordinary number first, 18.52 million = 18,520,000. Now carry out short division, or another method, to give an answer of 9,260,000.

10/12 of the drink will be water which simplifies to 5/6.

The missing number is 4 as both sides must equal 7.

42000 divided by 8 is 5250, and 5250 multiplied by 5 is 26250.

"Of" means "multiply", so multiply the two fractions together to give 15/32.

Just multiply 4 by 8 to give 32.

10 divided by 2 is 5, and 5 times 3 is 15.

You need to follow the rule divide by the top, and multiply by the bottom.

8 divided by 4 is 2, and 2 times 5 is 10.

So the number is 10.

1% is 840 divided by 100 to give 8.4.

Next multiply 8.4 by 6.5 to give 54.6.

Apply the rule divide by the bottom and times by the top.

36 divided by 9 is 4, and 4 times 7 is 28.

Just add the numerators and keep the denominators the same to give 7/5, which can be converted to 1 2/5.

To find one quarter of a number divide by 4, so 80 divided by 4 is 20.

12 divided by 3 is 4, and 4 times 8 is 32.

First work out 1/3 of 90 by dividing by 3 to give 30.

So 2/3 of something is 30.

To work this out divide 30 by 2 which is 15, and then times 15 by 3 to give 45.

You need to divide by the numerator and multiply by the denominator as you need the number in the question.

30 divided by 5 is 6, and 6 times 8 is 48.

Follow the rule divide by the bottom and times by the top.

70 divided by 10 is 7, and 7 times 3 is 21.

72 divided by 9 gives 8, and 8 multiplied by 5 gives 40.

91 divided by 7 is 13, and 13 times 4 is 52.

To find one eigth of a number divide by 8, but since the answer is given multiply by 8 instead.

11 multiplied by 8 is 88.

First, work out 1/11 by dividing 176 by 11 to give 16.

Now, multiply 16 by 5 to give 80.

Follow the rule divide by the bottom and times by the top.

14 divided by 11 is 1.27..., and 1.27... multiplied by 7 gives 8.91 (rounded to 2dp)

24 divided by 4 is 6, and 6 multiplied by 3 is 18.

You need to use the rule divide by the bottom and times by the top in reverse, as the number in the question is missing.

So instead divide by the top, and times by the bottom.

630 divided by 7 gives 90, and 90 multiplied by 10 gives 900.

Use the rule divide by the bottom and times by the top.

60 divided by 4 is 15, and 15 multiplied by 3 is 45.

To work out one eigth of any number divide the number by 8. So 125 divided by 8 gives 15.625.

The rule will have to be done in reverse, so "divide by the top and times by bottom".

20 divided by 4 gives 5, and 7 multiplied by 5 gives 35.

The answer can be checked using the normal rule.

The number is 18, and 18 divided by 3 is 6.

First divide 1280 by 4 to give 320, and multiply 320 by 5 to give 1600.

You just need to simplify 54/150, do this by dividing by 6 to give 9/25.

To work out one ninth of a number divide the number by 9.

So 96 divided by 9 gives 10.7 (rounded to 1 decimal place).

Follow the rule, "divide by the bottom and times by the top".

So 14 divided by 7 = 2, and 2 multiplied by 4 = 8.

You need to use the rule "divide by the bottom and times by the top". 63 divided by 7 = 9, and 9 multiplied by 4 is 36. Finally add the 36 on to the 63 to give 99.

To find 1/8 divide the number by 8.

6 divided by 8 gives 0.75.

1/5 of a number can be found by dividing the number of 5.

Therefore, 7 divided by 5 gives 1.4

Divide 100 by 7 to get 14.28. 14.28 multiplied by 5 is 71.4, rounded to 1 decimal place.

1/8 of a number can be found by dividing the number by 8.

So 14 divided by 8 gives 1.75.

First work out 8% of 60 which is 4.8.

So one fifth of something is 4.8.

Since 1/5 means divide by 5, multiply 4.8 by 5 to find the missing number.

The asnwer will be 24.

40 divided by 8 is 5, and 5 multiplied by 5 is 25.

Just multiply 49 by 9 to give 441.

To work out 1/5 divide the number by 5.

8 divided by 5 is 1.6.

You can still use the rule divide by the bottom and times by the top even if your amount is a fraction.

Divide 4/5 by 8 to give 1/10, now multiply 1/10 by 5 to give 1/2.

Its probably easier to cancel 3/6 down to 1/2, so you need to work out one half of 248.

So 248 divided by 2 gives 124.

Use the method divide by the bottom and times by the top.

66 divided by 11 is 6, and 6 times 4 is 24.

First divide 24 by to to give 12, and multiply 12 by 3 to give 36.

Now find 5/9 of 36, by dividing 36 by 9 to give 4, and multiplying 4 by 5 to give 20.

Divide 182 by 13 to give 14, then multiply 14 by 9 to give 126.

First work out 1/5 of the number by dividing by 5, so 30 divided by 5 is 6.

Now work out 4/5 by mutiplying the answer by 4, so 6 multiplied by 4 gives 24.

4 can be written as a fraction as 4/1.

Now, multiply the two fractions together 1/7 times 4/1 = 4/7.

Follow the rule divide by the denominator and multiply by the numerator.

48 divided by 12 gives 4, and 4 multiplied 3 gives 12.

40 divided by 8 is 5, and 5 multiplied by 6 is 30.

This is working out a fraction of an amount, so apply the rule "divide by the bottom and times by the top".

So 27 divided by 9 is 3, and 3 multiplied by 5 is 15.

First work out 3 divide by 11 to give 0.27..., and 0.27... multiplied by 6 gives 1.64 to 2 decimal places.

These numbers are 5 more than the square number sequence n^2 so the nth term is n^2 + 5.

To work out 1/7 of a number divide the number by 7.

So 15000 divided by 7 gives 2142.86 rounded to decimal places.

First make the denominators the same by putting 30 on the bottom of both fractions.

S0 7/10 = 21/30, and 2/3 = 20/30

Now 21/30 - 20/30 is 1/30.

To find one sixth of something you divide by 6.

But since you have the answer already to the question, then multiply the 11 by 6 instead to give 66.

You will need to apply the rule divide by top and multiply by the bottom.

96 divided by 3 is 32, and 32 times 4 is 128.

Use the rule in the article in reverse.

Divide 60 by 3 to give 20, and now multiply 20 by 8 to give 160.

Multiply the numerator and denominator of 6/7 to give 12/14, so 3/14 is less than 6/7.

Just multiply the numerators and denominators together of both fractions to give 4/25.

Fisrt work out 84 divided by 6 to give 14. Now multiply 14 by 5 to give 70.

To find 1/9 of a number divide the number by 9.

12 divided by 9 is 4/3 or 1.3 recurring.

Follow the rule divide by the bottom and multiply by the top.

12 divided by 5 is 2.4, and 2.4 times 4 is 9.6.

60 divided by 5 is 12, and 12 times 4 is 48.

56 divided by 7 is 8, and 8 times 8 is 64.

84 divided by 7 is 12, and 12 multiplied by 3 is 36.

Divide 60 by 5 to give 12, then multiply 12 by 3 to give 36.

Follow the rule divide by the bottom and times by the top.

Divide 72 by 3 to give 24, as 1/3 means divide by 3.

Just divide 1/4 by 5/6 to give 3/10.

Convert the mixed number to an improper fraction which is 13/8.

Now work out 13/8 of 56 by using the rule divide by the bottom and times by the top.

56 divided by 8 is 7, and 13 times 7 is 91.

Just multiply the 6 by 9 to give 54. So the number you are looking for is 54.

Write 7 as a fraction as 7/1.

So work out 7/1 divided by 2/3.

Use the rule keep, flip and change to give 21/2.

To work out 1/3 you just need to divide your number by 3. So 5,280,000 divided by 3 is 1,760,000.

First work out 48 divided by 6 which is 8.

Now multiply 8 by 5 to give a final answer of 40.

First, find 1/7 by dividing by 7 to give 5.

Now find 6/7 by multiplying this answer by 6 to give 30.

First make common denominators so the two fractions can be added together.

Multipliy the first fraction by 4 to give 12/56, and the second fraction by 7 to give 21/56.

Now add these fractions together to give 33/56.

Use the rule "divide by the bottom and times by the top"

128 divided by 8 gives 16.

16 multiplied by 3 gives 48.

To find one quarter of a number divide the number by 4.

So 1640 divided by 4 is 410.

She spent 5/8 on clothes if you add the two fractions together, so 3/8 are left over.

Apply the rule divide by the bottom and times by the top.

420 divided by 5 is 84, and 84 times 4 is 336.

The rule divide by the bottom and times by the top must be applied in reverse, as the number in the question is needed.

First divided 36 by 3 to give 12, and then multiply 12 by 8 to give 96.

First of all divide 1.8 by 6 to give 0.3.

Now 0.3 multiplied by ? gives 1.5.

Find ? by dividing 1.5 by 0.3 to give an answer of 5.

The answer will be 4/11 (subtract the numerators and keep the denominator the same).

Apply the rule divide by the bottom and times by the top.

11 divided by 3 gives 11/3.

11/3 multiplied by 2 gives 22/3 which as a mixed number is 7 1/3.

To work out one third divide the number by 3.

40,000 divided by 3 gives 13,333.3 (to 1 decimal place)

Follow the rule divide by the bottom number and times by the top number.

200 divided by 5 is 40, and 40 times 4 is 160.

72 divided by 12 is 6, and 6 times 5 is 30.

Follow the rule divide by the bottom, and times by the top.

35 divided by 7 gives 5, and 5 multiplied by 5 gives 25.

Put 6 on the numerator, and 15 on the denominator to give 6/15, which sipmplifies to 2/5.

Its easier in this case to just multiply the fractions together to give 35/20 which simplifies to 7/4.

Write 14 as a fraction as 14/1. Now multiply the fractions together to give 14/8.

This can be simplified to 7/4 or 1.75.

A quarter can be found by halving the number twice.

Half of 24 is 12, and half of 12 is 6.

60 divided by 12 is 5, and 5 times 5 is 25.

84 divided by 7 gives 12, and 12 mulplited by 5 gives 60.

Divide 11 by 6 to give 1.83..., so multiply 1.83... by 5 to give 9.17 to 2 decimal places (or 55/6).

18 divided by 9 is 2, and 2 times 6 is 12.

Follow the rule divide by the bottom and times by the top.

Just simplify the fraction to its lowest terms by dividing the numerator and denominator by 6 to give 1/3.

Apply the divide by the top, and times by the bottom as you need the number in the question.

36 divided by 2 is 18, and 18 times 9 is 162.

The rule divide by the bottom and times by the top can still be used if the fraction is improper.

3.5 divided by 5 gives 0.7, and 0.7 multiplied by 7 gives 4.9.

48 divide by 8 is 6, and 6 multiplied by 5 is 30.

Follow the rule divide by the bottom and times by the top.

48 divided by 8 is 6, and 6 multiplied by 7 is 42.

So the answer is 42kg.

Just work out 2 divided by 11 using your calculator or by short division to give 0.181818...

40 divided by 8 is 5, and 5 multiplied by 5 is 25.

Work out one eighth by dividing by 8 to give 4. Now multiply 4 by the 2 to give 8.

Alternatively, cancel 2/8 down to 1/4 and work out 1/4 of 32 to give 8 by dividing by 4.

This is the same as working out 3/8 multiplied by 2/5 as of means multiply.

So 3/8 times 2/5 is 6/40 or 3/20.

Follow the rule divide by the bottom and times by the top.

20 divided by 8 is 2.5, and 2.5 multiplied by 2 is 5.

"Divide by the bottom and times by the top"

90 divided by 6 is 15, and 15 times 5 is 75.

4 divided by 7 is 0.57... and 0.57 multiplied by 5 gives 2.86 rounded to 2 decimal places.

Follow the rule divide by the bottom and times by the top.

66 divided by 6 is 11, and 11 multiplied by 5 is 55.

To work out 1/8 of any number divide the number by 8.

48 divided by 8 is 6.

So there are 6 bottles of water.

Just divide the number by 5 when working out one fifth of a number.

The answer will be 13.

Work out 1% of 1200 by dividing 1200 by 100 to give 12.

Now multiply 12 by 1.75 to give 21.

Follow the rule divide by the bottom and times by the top.

6 divided by 3 is 2, and 2 times 2 is 4.

9 divided by 3 is 3, and 3 multiplied by 8 is 24.

28 divided by 7 is 4, and 4 times 3 is 12.

60 divided by 5 is 12, and 12 multiplied by 3 gives 36.

Instead of following the rule "divide by the bottom and times by the top", do the inverse to this which is "divide by the top and times by the bottom".

So 49 divided by 7 is 7, and 7 multiplied 8 is 56.

First, divide 133 by the denominator of the fraction which is 7, to give 19, and then multiply 19 by the numerator (3), to get 57.

First divide by the denominator to give 24, now multiply 24 by the numerator to give 72.

Just divide 28 by 7 to give 4.

Just divide 9 by 9 to give 1, 1/9 means divide by 9.

First convert 0.25 to a fraction which is one quarter.

So you need to work out one quarter of 40.

Do this by dividing by 4, so the answer is 10.

7 divided by 7 is 1, and 1 times 5 is 5.

The answer will be 1 too (1 divided by 1 is 1, and 1 times 1 is 1).

7 divided by 3 is 2.333... and 2.333 times 2 is 4.666... (or 4.7 to 1 decimal place).

To work out 1/5 of any number divide the number by 5.

So 240 divided by 5 is 48.

First cancel 12/15 to 4/5.

Now work out 7 divided by 5 to give 1.4, and then 1.4 times 4 to give 5.6.

Use the rule in the artice "divide by the bottom, and times by the top".

48 divided by 4 is 12, and 12 multiplied by 3 is 36.

Just divide 6000 by 3 to find one-third of any number.

This will give you 2000.

First, divide 27 by 3 to give 9, and then multiply 9 by 4 to give 36.

Divide 42 by 2 give 21, and then multiply 21 by 9 to give 189.

First of all convert 3 7/8 to an improper fraction which is 31/8.

Now apply the rule divide by the bottom and times by the top.

9 divided by 8 gives 1.125, and 1.125 multiplied by 31 gives 34.875.

You need to use the rule divide by the top and times by the bottom, as you are after the original amount.

40 divided by 2 is 20, and 20 times 7 is 140.

Put 42 on the numerator and 70 on the denominator of the fraction to give 42/70.

Since 42 and 70 are both multiples of 7, divide 42 and 70 to give 6/10.

6 and 10 are both multiples of 2, so divide by 2 to give 3/5.

42 shared by 7 is 6, and 6 times 6 is 36.

To find one ninth of any number just divide by 9, so the answer is 6.7 rounded to 1 decimal place.

Follow the rule divide by the bottom and times by the top.

144 divided by 8 is 18, and 18 times 7 is 126.

Now work out the difference between 126 and 96 which is 30.

First divide 1200 by 4 to give 300. Now multiply 300 by 3 to give 900.

Now work out 3/4 of 900 by dividing by the bottom and multiplying by the top.

900 divided by 4 is 225, and 225 times 3 is 675.

First work out 1% of 8.5 million by dividing 8.5 million by 100 to give 85,000.

Now multiply 85,000 by 3 to give 255,000.

One tenth of twenty is 2, and 2 times 2 is 4.

First work out 3/8 of 40 by doing 40 divided by 8 to give 5, and 5 times 3 is 15.

Now subtract 15 from 40 to give 25.

42 divided by 8 is 5.25, and 5.25 times 3 is 15.75.

Follow the rule divide by the bottom and times by the top.

First round 48 to the nearest multiple of 7 which is 49.

Now work out 4/7 of 49.

49 divided by 7 is 7, and 7 times 4 is 28.

So the answer will be about 28.

Apply the rule divide by the bottom and times by the top.

160 divided by 6 is 26.7 rounded to 1 decimal place.

To work out 1/3 divide the number by 3, so 8/3 = 2.6 recurring.

On this one its probably best to convert 1 1/2 to a decimal which is 1.5

Now work out 1.5 times 63 which is 94.5.

To work out one-seventh of a number divide the number by 7.

So 77 divided by 7 is 11.

1/4 is 9, and 3/4 is 27 (36 divided by 4 times 3).

It's probably best to convert 1 1/2 to 1.5, and then work out 1.5 multiplied by 60 to give 90.

Use the rule divide by the bottom and times by the top.

63 divided by 9 gives 7, and 7 times by 4 gives 28L.

You will need to work out 40 divided by 7, and then times the answer by 5.

This will give an answer of 28.6 rounded to 1 decimal place.

This is the same as working out 5/8 of 128.

Do this by dividing by the bottom numbers, and multiplying by the top number.

So 128 divided by 8 is 16, 16 times 5 is 80.

Just divide 7 by 7 to give 1.

Its easier just to multiply the fractions here, as the word of can also mean multiply.

1/7 multiplied by 1/14 is 1/98.

Follow the rule divide by the bottom and times by the top.

24 divided by 8 is 3, and 3 times 3 is 9.

Write 12 on the numerator of the fraction, and 48 on the denominator of the fraction.

Next cancel the fraction down by dividing the numerator and denominator by 12 to give 1/4.

Times means of, so you need to work out 2/9 of 45.

45 divided by 9 is 5, and 5 times 2 is 10.

Work out 140 divided by 10 to give 14, and then times 14 by 4 to give 56.

To work out one seventh of any number divide by 7. So 14 divided by 7 is 2.

To answer this question convert 4% into a fraction and simplify.

4% means 4 out of 100 so the fraction is 4/100.

Now simplify 4/100 by dividing the numerator and denominator by 4.

This gives a final answer of 1/25.

Just divide 60 by 12 to give 5.

To find 1/4 of any number divide the number by 4 to give 80.

First convert them to improper fraction (5/2 + 14/3 + 11/6).

Now make a common denominator of 6 (15/6 + 28/6 + 11/6).

Next add them up to give 54/6 which is the same as 9.

Apply the rule divide by the bottom and times by the top.

30 divided by 10 is 3, and 3 times 7 is 21.

36 divided by 2 is 18, and 18 multiplied by 5 is 90.

You need to use the rule divide by the top and multiply by the bottom.

42 divided by 2 is 21, and 21 multiplied by 5 is 105.

Change 3/4 to a decimal to give 0.75.

Now work out 48 minus 0.75 to give 47.25.

Use the rule divide by the bottom and times by the top.

14 divided by 7 is 2, and 2 multiplied by 3 is 6.

Just multiply the fractions to work out the product.

3/9 times 5/8 is 15/72 or 5/24.

Yes the method you are using is correct.

Work out 5 divided by 8 on a calculator or use a short division method.

The answer should be 0.625.

Divide 60 by 5 to give 12, and 12 times by 2 is 24.

To work out 1/4 of any number divide the number by 4.

£15.10 divided by 4 is £3.775, or £3.78 to the neared penny.

Follow the rule divide by the bottom and times by the top.

240 divided by 6 gives 40, and 40 times 5 is 200.

So Mohammed got £200.

Just divide 35 by 4 to give 8.75.

You need to figure out 100%. So work out 1% by dividing 18 by 77, and multiply the answer by 100 to give 23.38 to 2 decimal places.

Convert 1 1/4 to an improper fraction to give 5/4.

Now work out 5/4 of 96.

96 divided by 4 is 24, and 24 times 5 is 120.

First divide 9 by 3 (the numerator) to give 3.

Next multiply 3 by 8 (the denominator) to give 24.

So the number is 24.

You can check the answer by working out 3/8 of 24.

40 divided by 8 is 5. and 5 multiplied by 2 is 10.

72 divided by 9 is 8, and 8 times 5 is 40.

Divide 728 by 8 to give 91, and then multiply 91 by 7 to give 637.

Just divide 50.25 by 67 to give 0.75, and 0.75 as a fraction is 3/4.

Its easier just to multiply the fractions together as of means times (1/5 times 5/10 is 5/50).

5/50 can be simplified to 1/10.

7/14 can be simplified to 1/2, so you just need to work out 1/2 of 14 which is 7.

72 divided by 8 is 9, and 9 times 3 is 27.

"Of" can mean "multiply", so work out 1/11 multiplied by 1/6 to give 1/66.

To find one eighth of any number divide the number by 8.

160 divided by 8 is 20.

18 divided by 6 is 3, and 3 times 5 is 15.

32 divided by 8 is 4, and 4 times 5 is 20.

The easiest way to do this is to work out 1/2 times 63/2 as "of" means "times".

This will give an answer of 63/4.

Just divide 499 by 8 to give 62.375.

To find one twelfth of any number just divide the number by 12.

200 divided by 12 is 16.7.

Just divide 210 by 1.5 to give 140.

Divide 27 by 3 to give 9, and multiply 9 by 8 to give 72.

So there are 72 pages in the whole book.

4.8 divided by 8 is 0.6, and 0.6 times 3 is 1.8.

176 divided by 11 is 16, and 16 times 5 is 80.

Add 8 and 6 together to give 14.

Now divide 140 by 14 to give 10.

Now multiply 10 by 8 and 6 to give 80mg and 60mg.

Just divide 48 by 8 to give 6.

560 divided by 8 is 70, and 70 times 7 is 490.

1% of 4.20, and 4.20 times 35 is 147.

To find 1/3 just divide by 3 to give 2.

Start at the end, 3/7 of 84 is 36.

Then 2/9 of 36 is 8.

Then 1/4 of 8 is 2.

Finally 1/2 of 2 is 1.

This is the same as working out 9/24 + 22/24 which is 31/24.

1% is 72 divided by 100 which is 0.72.

Now multiply 0.72 by 37.5 to give 27.

Just divide 70 by 14 to give 5.

First divide 1.5 by 3 to give 0.5, and then 0.5 times 4 is 2 (apply the rule in the article byt in reverse).

Follow the method divide by the denominator and times by the numerator.

56 divided by 5 is 11.2, and 11.2 times 3 is 33.6

1% is 40 divide by 100 which is 0.4.

Now multiply 0.4 by 6.25 to give 2.5.

To find the number multiply 20 by 7 to give 140.

There are 8/8 in a whole one, so altogether there will be 13 eighths.

Divide 24 by 3 to give 8, and 8 times 5 is 40.

Follow the rule divide by the bottom and times by the top.

240 divided by 6 is 40, and 40 times 5 is 200.

Just multiply 140 by 7 to give 980.

Just divide 4 by 8 to give 1/2.

You just need to multiply 8 by 3 to give 24.

155 divided by 5 is 31, and 31 times 3 is 93.

560 divided by 7 is 80, and 80 multiplied by 4 is 320.

36 divided by 9 is 4 and 4 times 11 is 44.

Just multiply 200 by 4 to give 800.

32 divided by 4 is 8, and 8 times 6 is 48.

10 divided by 5 is 2, and 2 times 2 is 4.