How to Calculate Ratio?

A ratio is a comparison between two different things. For example, there are 5 shrubs and 10 trees in a yard. The ratio of shrubs to trees is 5 to 10. As a fraction is is written as 5/10 and as an odd, 5:10. Keep in mind that this ratio can be reduced. 1 to 2, 1/2, or 1:2.