# Rational Number

## Rational Number

Number that can be expressed in the form of the quotient of two integers a and b where b is not zero.

Rational numbers can be written in different forms, including fractional notation, decimal notation and percentage notation.

### Symbol

The symbol used to represent the set of rational number is the letter $$\mathbb{Q}$$.

### Examples

• Any fraction can represent a rational number.
• The number $$\frac {10}{15}$$ is a fraction that is equivalent to $$\frac {2}{3}$$.
• The expression $$\frac {4}{3}$$ represents a rational number.
• The decimal number 0.75 is also a rational number because it can be expressed in the form of the quotient of two integers, like this: $$\frac {3}{4}$$.
• The number $$\sqrt {2}$$ is not a rational number because we cannot express it as a quotient of two integers.