# Rational number

## quotient of two integers / From Wikipedia, the free encyclopedia

In mathematics, a **rational number** is a number that can be written as a fraction. The set of rational number is often represented by the symbol $\mathbb {Q}$, standing for "quotient" in English.^{[1]} ^{[2]}

Rational numbers are all real numbers, and can be positive or negative. A number that is not rational is called irrational.^{[3]}

Most of the numbers that people use in everyday life are rational. These include fractions, integers and numbers with finite decimal digits. In general, a number that can be written as a fraction while it is in its own form is rational.