Ratios and Proportions

Front

What is a Ratio?

Back

A comparison of two quantities.

Front

What is a Proportion?

Back

A statement of 2 ratios that are equal to each other.

Front

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

Back

k = 9

Front

Write the ratio of 4 apples to 10 oranges.

Back

2:5

Front

Simplify the ratio 12:16.

Back

3:4

Front

If a recipe calls for 2 cups of flour for every 3 cups of sugar, what is the ratio of flour to sugar?

Back

2:3

Front

Ella has 5 balloons. Taylor has 7 balloons. Write the ratio of Taylor's balloons to Ella's balloons.

Back

7:5

Front

If 8 pencils cost $4, how much do 20 pencils cost?

Back

$10

Front

What is the cross product in the proportion 2/3 = x/9?

Back

Cross product is 2 * 9 = 3 * x, so x = 6.

Front

If the ratio of boys to girls in a class is 3:4, how many boys are there if there are 28 girls?

Back

21 boys.