Proportion is also a general term in technical drawing, which refers to the ratio of the linear size of a figure in a drawing to its physical counterpart. In mathematics, proportion is the proportion of the number of parts in the whole.

Used to reflect the composition or structure of the population and calculate the proportion, that is, to obtain the proportion value/total value.

Proportion is divided into proportion and proportion, which means that the two proportions are equal. Simple understanding is the comparison between quantity and quantity, which refers to the weight of a thing in the whole. The basic nature of proportion is two related quantities. If one quantity changes, the other quantity will also change. If we want to judge whether two ratios can form a ratio, we must see whether their ratios are equal.