Rates, Ratios & Unit Rates

Front

What is a ratio?

Back

A ratio is a comparison of two quantities that shows the relative size of one quantity to another, often expressed as a fraction.

Front

How do you express a ratio?

Back

A ratio can be expressed in three ways: as a fraction (e.g., 2/3), with a colon (e.g., 2:3), or in words (e.g., 'two to three').

Front

What is a unit rate?

Back

A unit rate is a rate in which the second quantity is one unit. For example, if a car travels 60 miles in 1 hour, the unit rate is 60 miles per hour.

Front

Calculate the ratio of 20 apples in the fridge to 9 apples on the table.

Back

The ratio is 20/9.

Front

What is the unit rate of 35 diapers costing $6.99?

Back

The unit rate is $0.20 per diaper.

Front

If Will spent $3.75 for 3 pounds of granola, what is his unit rate in dollars per pound?

Back

The unit rate is $1.25 per pound.

Front

Which of the following expresses a ratio: 2/3, two-thirds, 0.667, or 2.3?

Back

2/3 expresses a ratio.

Front

What is the difference between a rate and a unit rate?

Back

A rate compares two different units (e.g., miles per hour), while a unit rate compares a quantity to one unit of another quantity.

Front

If a car travels 150 miles in 3 hours, what is the unit rate in miles per hour?

Back

The unit rate is 50 miles per hour.

Front

What is the ratio of 15 oranges to 5 apples?

Back

The ratio is 15/5 or simplified to 3/1.