# Learn Rational & Irrational Number # What do you mean by Rational & Irrational Number in math?

An online rational irrational number definition

A rational number is a number that can be written as a ratio.

Rational numbers can be written as a fraction, in which both the numerator (the number on top) and the denominator (the number on the bottom) are whole numbers.

The number 10 is a rational number because it can be written as the fraction 10/1.

## Irrational Numbers

All numbers that are not rational are considered irrational. An irrational number can be written as a decimal, but not as a fraction.

An irrational number has endless non-repeating digits to the right of the decimal point.

The number 22/7 is a irrational number..

### Math Number Symbols

R - Real Numbers

Z - Integers

N - Natural Numbers

Q - Rational Numbers

P - Irrational Numbers # Related Number Types

## Math number calculation ►

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