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 units, such as miles per hour or price per item.

Front

What is a unit rate?

Back

A unit rate is a rate in which the second quantity is one unit, such as 50 miles per 1 hour.

Front

How do you calculate a unit rate?

Back

To calculate a unit rate, divide the first quantity by the second quantity to find the amount per one unit.

Front

If 8 cookies cost $2.00, what is the unit rate per cookie?

Back

The unit rate is $0.25 per cookie.

Front

Which of the following is a unit rate: 1 giant donut per 2 kids or 55 kids per 1 bus?

Back

55 kids per 1 bus is a unit rate.

Front

What does it mean if two ratios are equivalent?

Back

Two ratios are equivalent if they represent the same relationship between quantities.

Front

If there are 20 green marbles and the ratio of green to red marbles is 1:3, how many red marbles are there?

Back

There are 60 red marbles.

Front

If Joe's Dry Cleaners charges $18 for 3 pairs of pants, how much does he charge for one pair?

Back

He charges $6 per pair of pants.

Front

What is the formula to find a unit rate?

Back

Unit Rate = Total Quantity / Number of Units.