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.

Front

What is a part-to-part ratio?

Back

A part-to-part ratio compares two parts of a whole to each other.

Front

What is a part-to-whole ratio?

Back

A part-to-whole ratio compares a part of a quantity to the entire quantity.

Front

What is a rate?

Back

A rate is a special kind of ratio that compares two quantities with different units.

Front

What is a unit rate?

Back

A unit rate is a rate in which the second quantity is one unit.

Front

How do you find a unit rate?

Back

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

Front

If there are 15 boys out of 23 students, what is the part-to-whole ratio of boys to total students?

Back

The part-to-whole ratio is 15:23.

Front

If 120 calories are in 2 servings, what is the unit rate of calories per serving?

Back

The unit rate is 60 calories per serving.

Front

If my father paid $25.50 for 5 movie tickets, what is the cost per ticket?

Back

The cost per ticket is $5.10.

Front

Lynnette can wash 95 cars in 5 days. How many cars does she wash each day?

Back

She washes 19 cars per day.