Ratios, Rates & Proportions

Front

A comparison of two or more numbers is called...

Back

Ratio

Front

In an animal shelter, the ratio of dogs to cats is 5 to 3. There are 25 dogs. Write and solve a proportion to find the number c of cats.

Back

c=15

Front

Austin mowed 7 lawns in 4 hours. At that rate, how long will it take him to mow 21 lawns?

Back

12 hours

Front

Last month there were 22 days that it rained and 8 days that were sunny. What is the ratio of sunny days to rainy days?

Back

4:11

Front

On a scaled drawing, a building measures 4.5 cm tall. If the scale of the drawing is 25 meters per 2 cm, how tall is the actual building?

Back

62.5 meters

Front

What is a rate?

Back

A rate is a ratio that compares two quantities with different units.

Front

What is a unit rate?

Back

A unit rate is a rate in which the second quantity is 1.

Front

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

Back

2:3

Front

How do you find a missing value in a proportion?

Back

Cross-multiply and solve for the missing value.

Front

What is a proportion?

Back

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