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

How can you express a ratio?

Back

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

Front

What is the ratio of 9 bananas to 4 apples?

Back

9:4

Front

What type of ratio is '5 out of 23 kids play the trumpet'?

Back

Part-to-whole ratio.

Front

What is the ratio of boys to girls if there are 13 boys and 10 girls?

Back

13:10

Front

If Ella has 5 balloons and Taylor has 7 balloons, what is the ratio of Ella's balloons to Taylor's balloons?

Back

5:7

Front

What does a part-to-part ratio compare?

Back

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

Front

What does a part-to-whole ratio compare?

Back

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

Front

If there are 12 red marbles and 8 blue marbles, what is the ratio of red to blue marbles?

Back

12:8 or simplified to 3:2.

Front

How do you simplify a ratio?

Back

To simplify a ratio, divide both terms by their greatest common divisor.