Ratios and Unit Rate

Front

What is a ratio?

Back

A ratio is a relationship between two quantities, showing how many times one value contains or is contained within the other.

Front

How do you express a ratio?

Back

A ratio can be expressed in three ways: using a colon (e.g., 4:3), as a fraction (e.g., 4/3), or with the word 'to' (e.g., 4 to 3).

Front

What is a unit rate?

Back

A unit rate is a comparison of two different quantities when they are combined together, expressed as a quantity per one unit of another quantity.

Front

How do you calculate a unit rate?

Back

To calculate a unit rate, divide the first quantity by the second quantity to find out how much of the first quantity corresponds to one unit of the second quantity.

Front

If you can buy 36 cookies for $4, what is the unit rate in cookies per dollar?

Back

The unit rate is 9 cookies per dollar.

Front

What is the ratio of triangles to squares if there are 4 triangles and 3 squares?

Back

The ratio of triangles to squares is 4:3.

Front

How do you find the ratio of two different colored apples?

Back

To find the ratio of two different colored apples, count the number of each color and express it as a ratio (e.g., 4 red apples to 3 green apples is written as 4:3).

Front

Patrick has 2 black, 3 red, and 5 white toy cars. What is the ratio of red toy cars to all toy cars?

Back

The ratio of red toy cars to all toy cars is 3:10.

Front

How do you find the total number of items in a ratio problem?

Back

To find the total number of items, add the quantities of all items involved in the ratio.

Front

If you have 44 stamps on 4 sheets, how many stamps are there per sheet?

Back

There are 11 stamps per sheet.