Rational+Numbers

A **rational number** is any number that can be written as a ratio of two numbers p and q, where q does not equal zero. Rational numbers include all whole numbers, integers, fractions, mixed numbers, terminating and repeating decimals.

An **irrational number** is any number that cannot be written as a ratio of p and q. Irrational numbers include Pi (3.14159...), e (2.71828...), square roots of 2, 3, 5, 7, 10, 11, 12, ...), any non-repeating, non-terminating decimal.