In this activity, we are going to find fractions of numbers.

To find a fraction of a whole number, we need to divide the whole number by the bottom number of the fraction (the denominator).

Example 1

Find 1/4 (one quarter) of 20.

Answer

We need to divide 20 by the bottom number, which is 4:

We work out 20 ÷ 4 = 5

1/4 of 20 is 5

Example 2

Find 1/3 (one third) of 21.

Answer

We need to divide 21 by the bottom number, which is 3:

We work out 21 ÷ 3 = 7

1/3 of 21 is 7

Example 3

Find 1/5 (one fifth) of 30.

Answer

We need to divide 30 by the bottom number, which is 5.

We work out 30  ÷  5 = 6

1/5 of 30 is 6.

Have you got the idea now? Let's try some questions.