Ratios, Rates and Unit Rates

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 rate?

Back

A rate is a specific kind of ratio that compares two different kinds of quantities, often expressed as a quantity per unit of another quantity.

Front

What is a unit rate?

Back

A unit rate is a rate in which the second quantity is one unit. It tells you how much of one quantity corresponds to one unit of another quantity.

Front

If 6 books cost $12, what is the cost of one book?

Back

$2 per book.

Front

Which of the following is a ratio: 6:9, 5 = 7, 3 out of 4, 5/7?

Back

6:9, 3 out of 4, and 5/7 are ratios. 5 = 7 is not a ratio.

Front

How do you find the unit rate from a total cost?

Back

Divide the total cost by the number of items to find the cost per item.

Front

If 3 boxes cost $12.60, what is the unit rate?

Back

$4.20 per box.

Front

If Joe's Dry Cleaners charges $18 for 3 pairs of pants, how much is it per pair?

Back

$6 per pair of pants.

Front

What is the ratio of green marbles to red marbles if there are 20 green and 60 red?

Back

The ratio is 1:3.

Front

How do you express a ratio in simplest form?

Back

Divide both quantities by their greatest common divisor.