Simple 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

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

Back

10 apples (2/3 = x/15, so x = 10).

Front

How do you simplify the ratio 6:9?

Back

Divide both numbers by their greatest common divisor, which is 3. The simplified ratio is 2:3.

Front

What is the ratio of 4 red balls to 6 blue balls?

Back

The ratio is 4:6, which can be simplified to 2:3.

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 students?

Back

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

Front

What is the ratio of 5 cats to 10 dogs?

Back

The ratio is 5:10, which simplifies to 1:2.

Front

If the ratio of boys to girls in a class is 3:2, how many boys are there if there are 10 girls?

Back

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

Front

What is the part-to-part ratio of 3 apples to 5 oranges?

Back

The part-to-part ratio is 3:5.