Fractions of Amounts Flashcards

GCSE Mathematics (Edexcel) 1MA1

Fraction of an amount

To find a fraction of an amount, multiply the amount by the numerator and divide by the denominator.

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Terms in this set (10)

1

Fraction of an amount

To find a fraction of an amount, multiply the amount by the numerator and divide by the denominator.

2

1/2 of 20

1/2 of 20 is 20 ÷ 2 = 10.

3

1/4 of 36

1/4 of 36 is 36 ÷ 4 = 9.

4

3/5 of 50

3/5 of 50 is (50 ÷ 5) × 3 = 30.

5

Finding 2/3 of 18

2/3 of 18 is (18 ÷ 3) × 2 = 12.

6

Simplifying fractions before multiplying

Simplify the fraction first if possible to make calculations easier.

7

Mixed number fractions of amounts

Convert the mixed number to an improper fraction before finding the fraction of the amount.

8

Example: 1 1/2 of 24

Convert 1 1/2 to 3/2. Then, 3/2 of 24 is (24 ÷ 2) × 3 = 36.

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Checking your answer

Use estimation to check if your answer is reasonable when finding a fraction of an amount.

10

Real-life example of fractions of amounts

If a recipe needs 2/3 of 300g of flour, calculate (300 ÷ 3) × 2 = 200g.

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