Introduction to Ratios

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 does a part-to-part ratio represent?

Back

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

Front

What does a part-to-whole ratio represent?

Back

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

Front

What is an additive relationship?

Back

An additive relationship means that quantities are combined by addition.

Front

What is a multiplicative relationship?

Back

A multiplicative relationship means that quantities are related by multiplication.

Front

If the ratio of apples to oranges is 4:1, what is the ratio of oranges to total fruits if there are 20 apples?

Back

The ratio of oranges to total fruits is 1:5.

Front

How do you simplify the ratio 10:5?

Back

To simplify the ratio 10:5, divide both numbers by 5, resulting in 2:1.

Front

What is the ratio of 3 red balls to 5 blue balls?

Back

The ratio of red balls to blue balls is 3:5.

Front

If there are 12 students in a class and 4 of them are girls, what is the part-to-whole ratio of girls to total students?

Back

The part-to-whole ratio of girls to total students is 4:12, which simplifies to 1:3.

Front

In a recipe, the ratio of sugar to flour is 2:3. If you use 2 cups of sugar, how much flour do you need?

Back

You need 3 cups of flour.