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.