Ratios and Rates Review

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

How do you simplify a ratio?

Back

To simplify a ratio, divide both terms of the ratio by their greatest common divisor (GCD).

Front

What is an equivalent ratio?

Back

Equivalent ratios are ratios that express the same relationship between two quantities, even if the numbers are different.

Front

If the ratio of cats to dogs is 2:3, how many cats are there if there are 15 dogs?

Back

There are 10 cats. (2/3 = x/15, so x = 10.)

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

Calculate the unit rate: 150 miles in 3 hours.

Back

50 miles per hour.

Front

What is the ratio of 12 apples to 16 oranges?

Back

The simplified ratio is 3:4.

Front

How do you find an equivalent ratio?

Back

To find an equivalent ratio, multiply or divide both terms of the ratio by the same non-zero number.

Front

What is the ratio of stars to red circles if there are 4 stars and 7 red circles?

Back

The ratio is 4 to 7.

Front

If a recipe calls for 2 cups of flour and 3 cups of sugar, what is the ratio of flour to sugar?

Back

The ratio of flour to sugar is 2:3.