# Does -20 belong to whole numbers integers and rational?

Nov 27, 2016

$- 20$ is in all those sets. See explanation.

#### Explanation:

A whole number (also called integer) is a number which has no fraction part (i.e. it has only digits and may also have a minus sign).

A rational number is any number which can be represented as a quotient of 2 integer numbers. This number can be written as $- 20 = \frac{- 20}{1}$. So it is a rational number