# Rational Numbers Math Definition

A rational number in math is any number that can be expressed in the form of a fraction.

Why a fraction? Because we can locate a fraction on a number line. A rational number is clear, sensible and can be found on a number scale.

Examples

2½=5⁄2

1.3=13⁄10

7=7⁄1

√0.81=0.9=9⁄10

The math symbol for a set of all rational numbers is Q.

Rational numbers can always be written as terminating or recurring decimals.

Numbers that cannot be written as a fraction are called irrational numbers.

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