Ratio and Proportion Practice Test

Front

What is a ratio?

Back

A ratio is a comparison of two quantities, showing how many times one value contains or is contained within the other.

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 terms and then solve for the unknown variable.

Front

If 20 ounces of smoothie costs $7, what is the cost per ounce?

Back

The cost per ounce is $7 ÷ 20 oz = $0.35 per ounce.

Front

If Mrs. Jones buys a 17oz smoothie, how much would it cost based on the cost per ounce?

Back

Cost = 17 oz × $0.35/oz = $5.95.

Front

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

Back

The ratio is 4 red apples to 3 green apples.

Front

How do you set up a proportion for baking cookies?

Back

Set up the proportion as: 120 dozen cookies / 5 days = 800 dozen cookies / x days.

Front

If Shane can bake 120 dozen cookies in 5 days, how many days would it take to bake 800 dozen cookies?

Back

It would take about 34 days.

Front

If Marin can write 4 pages in 22 minutes, how do you find the time to write 200 pages?

Back

Set up the proportion: 4 pages / 22 minutes = 200 pages / x minutes.

Front

How long would it take Marin to write 200 pages if she writes 4 pages in 22 minutes?

Back

It would take about 1100 minutes.