Ratio
From Simple English Wikipedia, the free encyclopedia
A ratio between two quantities A and B is their fraction A/B. A ratio is a mathematical way of expressing the proportion of A to B. For example, if I bought 20 apples and have only 9 left, what is the proportion (or ratio) of 9 to 20? The answer is 9/20 or 0.45/1. The ratio may also be written as 0.45.