Ratios and Rates

Front

What is a ratio?

Back

A ratio is a comparison of two quantities.

Front

What is a rate?

Back

A rate is a ratio that compares two different quantities.

Front

What is a unit rate?

Back

A unit rate is a rate where the denominator is 1.

Front

Which of the following is NOT equivalent to the ratio 3:5? 21:28, 6:10, 9:15, 12:20

Back

21:28 is NOT equivalent to 3:5.

Front

If the ratio of tenants to cars in an apartment building is 3:5 and there are 30 tenants, how many cars are there?

Back

There are 50 cars.

Front

How do you determine if two ratios are equivalent?

Back

Two ratios are equivalent if they simplify to the same fraction.

Front

What is the formula to find a missing value in a proportion?

Back

If a:b = c:d, then ad = bc.

Front

What is the relationship between ratios and fractions?

Back

Ratios can be expressed as fractions, and vice versa.

Front

If a recipe calls for a ratio of 2:3 of sugar to flour, how much flour is needed for 4 cups of sugar?

Back

6 cups of flour are needed.

Front

What is the difference between a ratio and a rate?

Back

A ratio compares two quantities of the same kind, while a rate compares two quantities of different kinds.