9.1Why Ratio and Rate Matter
A recipe scaled for a canteen, a map, a km/h speed limit. A ratio compares like with like, a rate compares unlike with unlike, and every method here keeps one comparison fixed while the numbers change.
Section 1 of 8
Learning Outcomes
- Simplify ratios and find equivalent ratios
- Divide a quantity in a given ratio
- Solve problems involving ratios of two and three quantities
- Calculate unit rates and compare rates
- Apply simple interest formula
- Solve problems involving hire purchase and currency exchange
- Use the relationship to solve speed problems
- Convert between km/h and m/s
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Practise this
Questions on Ratio and Rate, marked as you go, with the working shown.