Ratios, Rates and 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 to b' or a:b.

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 dollars per pound.

Front

What is a unit rate?

Back

A unit rate is a rate in which the second quantity is one unit, such as 8 dollars per pound or 33 miles per gallon.

Front

How do you calculate the unit rate?

Back

To calculate the unit rate, divide the first quantity by the second quantity.

Front

If you spend $40 on 5 pounds of concrete, what is the unit rate?

Back

$8 per pound.

Front

What is the equivalent rate of $9 per hour for 3 hours?

Back

$27 in 3 hours.

Front

If a car drives 231 miles using 7 gallons of gas, what is the unit rate in miles per gallon?

Back

33 miles per gallon.

Front

What is the ratio of girls to boys if there are 7 boys and 9 girls?

Back

9 to 7.

Front

What are the three different kinds of ratios?

Back

Part to Part, Part to Whole, Whole to Part.

Front

What is the formula for finding a unit rate?

Back

Unit Rate = Total Quantity / Number of Units.