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

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.

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

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.

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.

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

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.

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

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

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

So 1640 divided by 4 is 410.

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.

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.

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.

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.

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

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

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.

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.

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

So 14 divided by 8 gives 1.75.

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.

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

128 divided by 8 gives 16.

16 multiplied by 3 gives 48.

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.

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.

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.

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

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

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

So 77 divided by 7 is 11.

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.

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

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.

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

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

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

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.

Change 3/4 to a decimal to give 0.75.

Now work out 48 minus 0.75 to give 47.25.

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.

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.

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.

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.

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.

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