Ratios and Rates

Front

What is a ratio?

Back

A ratio is a comparison of two quantities.

Front

If there are 5 ice cream cones for every 3 brownies, how many ice cream cones are sold if 24 brownies are sold?

Back

40 ice cream cones.

Front

What is a proportion?

Back

A proportion is when two ratios are equivalent and show the same value.

Front

Which of the following is NOT equivalent to 3:5? 15:25, 9:15, 21:28, 30:50

Back

21:28.

Front

What is the ratio of red apples to green apples if there are 4 red apples and 3 green apples?

Back

4 red apples to 3 green apples.

Front

What is a rate?

Back

A rate is a ratio that compares two different kinds of quantities.

Front

How do you simplify a ratio?

Back

By dividing both terms of the ratio by their greatest common factor.

Front

If a recipe calls for a ratio of 2:3 of sugar to flour, how much sugar is needed for 9 cups of flour?

Back

6 cups of sugar.

Front

What does it mean for two ratios to be equivalent?

Back

It means they represent the same relationship between quantities.

Front

If the ratio of boys to girls in a class is 2:3, what fraction of the class are boys?

Back

2/5 of the class are boys.