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Lesson 17 · Ratio, Proportion and Percentage

Percentage

MathematicsSubject

14 minEstimated read

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Lesson 17 topics

Percentage Ratio and Proportion

Quick Facts

Lesson: 17: Ratio, Proportion and Percentage
Topic: Percentage
Domain: Daily Arithmetic

Per cent means out of a hundred. It is the common bottom everybody agreed on, which is why 17/20 and 41/50 can be compared as 85% and 82%.

Study Tip

A 20% rise then a 20% fall does not bring you back, because the two percentages were taken from different starting amounts. Always ask: a percentage of what?