Percentages (AQA GCSE Maths): Flashcards

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Percentages - GCSE revision guide
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Meaning of 'per cent'

Out of 100

Method to find x% of y

Convert % to decimal, multiply by y

% increase multiplier: > or < 1?

Greater than 1

% decrease multiplier: > or < 1?

Less than 1

Formula: x as % of y

xy×100\frac{x}{y} \times 100

% change formula

ChangeOriginal×100\frac{\text{Change}}{\text{Original}} \times 100

Reverse %: steps to find original

Identify %, find 1%, multiply by 100

Simple interest: calculated on what?

Original principal only

5% increase multiplier

1.05

26% decrease multiplier

0.74

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