True/False:
A ratio is a comparison of two quantities.

There are two ways to compare ratios:

part to part
part to ___________

There are 18 students in the class.
8 of them are girls.

Identify the two parts and the whole for this problem.

There are 24 players on a team. 8 players are new to the team this year.

What is the ratio of new players to returning players?
(Don't forget to reduce!)

4 of the 5 cars were red.

Which of the following is not a way to write the ratio:
a. 4 : 5
b. 4/5
c. 4 - 5
d. 4 to 5

True/False:
A proportion is a statement that shows two ratios are equal.