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Maths

Fraction basics

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For your exam, you will need to feel confident when dealing with fractions. This section will help you to recognise equivalent fractions and practise simple calculations.

Fractions of a quantity

How do we find 3/5 of 20?

Method 1 is to find 1/5 of 20, then multiply by 3.

1/5 of 20 is 20 ÷ 5 = 4.

We need 3/5 of 20, so we multiply 4 by 3.

3/5 of 20 = 4 × 3 = 12.

Method 2 is to multiply 3/5 by 20 (more on multiplying fractions here and here).

3/5 × 20 = 3/5 × 20/1 = 60/5 = 12

Question

Use either method to find 3/7 of 35.

toggle answer

Answer

The answer is 15.

(1/7 of 35 is 5.)

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