How to do Ratios?

In math, to do ratios requires comparing two thing and then expressing it in one of three ways. For example, to write the ratio 2 out of 5 apples, you can write it as 2 to 5, a fraction 2/5, or 2:5. To figure out if two ratios like 1/2 equals 4/8, you equate them 1/2=4/8, and then cross multiply (1x 8=4x 2). If the answers are the same, then the ratios are equal. You can find more information here: