Ratios and Proportions

Front

What is a Ratio?

Back

A ratio is a comparison of two quantities.

Front

Simplify the ratio 12:3.

Back

4:1

Front

Solve the proportion: 3/5 = k/15. What is k?

Back

k=9

Front

Which of these ratios is equivalent to 3:4? 12:9, 9:20, 9:12, 803:804.

Back

9:12

Front

Find the unit rate of the ratio: 30 cm of snow in 6 hours.

Back

5 cm of snow per hour

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Front

If 2 apples cost $1, what is the unit rate?

Back

$0.50 per apple

Front

What is the cross-multiplication method used for?

Back

It is used to solve proportions.

Front

If a recipe calls for a ratio of 2:3 of sugar to flour, how much sugar is needed for 6 cups of flour?

Back

4 cups of sugar.

Front

What is an equivalent ratio?

Back

An equivalent ratio is a ratio that expresses the same relationship between quantities.