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Lesson 17 · Ratio, Proportion and Percentage

Ratio and Proportion

MathematicsSubject

14 minEstimated read

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Question 1 of 10

1A ratio compares

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Lesson 17 topics

Percentage Ratio and Proportion

Quick Facts

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

A ratio compares two quantities with each other, not with a whole. In the ratio 2 : 3 there are five parts, so the shares are two fifths and three fifths.

Study Tip

In direct proportion, doubling one quantity doubles the other. In inverse proportion it halves it: 6 workers take 10 days, so 12 workers take 5.