Ratios and Proportions

Front

What is a Ratio?

Back

A ratio is a comparison of two quantities.

Front

What does it mean to simplify a ratio?

Back

To simplify a ratio means to reduce it to its simplest form, where the two numbers have no common factors other than 1.

Front

What is the ratio of total players to boys in a baseball team with 16 girls and 8 boys?

Back

3:1

Front

How do you express the ratio 5:15 in simplest form?

Back

1:3

Front

If 10 students want hotdogs and 26 want hamburgers, what is the ratio of students wanting hotdogs to those wanting hamburgers?

Back

10:26

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Front

How do you find an unknown in a proportion?

Back

Cross-multiply the known values and solve for the unknown.

Front

What is the scale of a drawing?

Back

The scale of a drawing is the ratio of the size of the drawing to the size of the actual object.

Front

If a scale drawing has a ratio of 4 cm:9 ft, how do you find the actual size from the drawing size?

Back

Use the scale ratio to set up a proportion and solve for the actual size.

Front

What is the simplest form of the ratio 24:36?

Back

2:3