Proportionality

From Wikipedia, a free encyclopedia written in simple English for easy reading.

A proportion is a relationship between two quantities or numbers. A proportion can be expressed as a word, for example, one man may be described as smaller than another man. A proportion can usually be expressed more accurately by numbers. For example, the proportion, or mathematical relationship, between one man and two men can be written as the numbers 1/2, which is also known as a fraction or ratio.