# What is Ratio?

A ratio is a comparison of the sizes of two or more quantites of the same kind by division.

If a and b are two quantities of the same kind (in same units),then the fraction $\frac{a}{b}$ is called the ratio of a to b. Thus the ratio of a to b=$\frac{a}{b}$. It is written as $a:b$.

The quantites a and b are called the terms of the ratio, a is called the first term(or antecedent) and b is called the second term(or consequent).

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