Unit 3
Ratios, Proportions, and Percentages

Percentages, ratios, and proportions may all seem like different concepts, but as this unit demonstrates, they are really very much the same.

Objectives

After completing this unit, you should be able to perform the following tasks.

1. Define the terms “ratio” and “proportion.”
2. Use ratios to make comparisons.
3. Formulate and solve problems involving proportions.