More ratio for the exam: one quantity as a fraction of another, ratio notation with units, ratios as linear functions, gradients as rates, similar shapes through length, area and volume ratios, and repeated percentage change.
Start with Fractions, ratio notation and linear functions. In 30 minutes you will be able to write one quantity as a fraction or a percentage of another, changing units first. 2 of the 4 lessons here are free.
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