Proportions

Front

What is a proportion?

Back

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

Front

How do you solve a proportion?

Back

To solve a proportion, cross-multiply the two ratios and set the products equal to each other.

Front

What is the formula for finding a missing value in a proportion?

Back

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

Front

If a car travels 280 miles in 7 hours, how far will it travel in 12 hours?

Back

480 miles.

Front

It takes Emma 18 minutes to type and spell check 14 pages. How long for 77 pages?

Back

99 minutes.

Front

A can of lemonade requires 4 scoops for 28 cups of water. How much for 40 scoops?

Back

280 cups of water.

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division.

Front

If the ratio of completed to attempted passes is 7 to 8, how many passes completed if 24 attempted?

Back

21 passes.

Front

How do you convert kilometers to miles?

Back

Multiply the number of kilometers by 0.621371.

Front

5 kilometers is about how many miles?

Back

3.1 miles.