How To: Solve Proportions

How to Solve Proportions

In this how to you will learn about proportions. A proportion is comparing two ratios. Here is an example of a problem.

First, you cross multiply and show your work. Next, you simplify. After, in order to get the variable alone, you divide each side by four. Since you can't divide 21 by eight without a decimal so your answer is 21/8.