Ratio 1 (AQA GCSE Maths): Flashcards

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Ratio 1
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What is a ratio?

A mathematical tool to compare quantities and show relationships between amounts

Three ways to write ratios

Ratio notation (3:23:2), fraction form (25\frac{2}{5}), word form

How to read 3:23:2

3 to 2

Denominator in ratio fraction represents

Sum of all parts in the ratio

How to create equivalent ratios

Multiply or divide both parts by the same number

Simplest form of ratio

Whole numbers with no common factors other than 1

Is 3:23:2 same as 2:32:3?

No, order matters in ratios

Examples of simplest form ratios

5:15:1, 10:910:9, 2:32:3, 4:74:7

Examples NOT in simplest form

1:1.51:1.5, 2:102:10 (decimals or common factors)

Multiply 5:95:9 by 2 gives equivalent ratio

10:1810:18

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