1. 1. Find and simplify a ratio 2. Use a ratio to work out amounts
Ratio How To …
1. Find and simplify a ratio
2. Use a ratio to work out amounts

2. Find and simplify a ratio
Subtract the given amount from the total; then simplify by finding common multiples
Of 250 children in a school 150 are girls. What is the ratio of girls to boys
250 children – 150 girls = 100 boys
Simplify = 15:10
Simplify =
3:2

5. Use a ratio to work out amounts
Apples
Cranberries 1 9
To make 9 pies, increase both apple and cranberry quantities by 9
Use a ratio to work out amounts
Apples
Cranberries 9 81
Pizza = £15.
John
Rita
Patience
2 slices
1 slice
How much does each person pay?
Price ÷ total slices = 15 ÷ 5 = 3
1 slice = £3 (Patience) 2 slices = £6 (John and Rita each)