All lessons › Unit 2 · Rates and percents

Ratios, rates and proportions

Ratios, rates and proportions are part of the Problem-Solving and Data Analysis questions on the Digital SAT Math section. The problems use real situations, like speed, price per item or a recipe.

This lesson starts with ratios, moves to rates and unit rates, and ends with proportions you can solve by cross-multiplying. Every idea has animated pictures, a short quiz after each part and practice questions. Once you see the pattern, these are points you can win. Real examples, like speed, price per item and recipes, make each rule easy to remember. Unit rates in particular come up again in later lessons.

In this lesson

• Ratios
• Rates and unit rates
• Proportions