What are the properties of rational numbers?

Answer by  willard (874)

The set of rational numbers is the set of all numbers that may be written as the ratio of two integers. So, 3/5 is the ratio of three to 5 and therefore rational, while square root of two cannot be written as the ratio of two integers, and is irrational.

Answer by  cgroverla (516)

Rational numbers can always be expressed as a fraction with integers in both numerator and denominator. The sum, difference, and product of two rational numbers is always rational. The reciprocal of a nonzero rational number is also rational.

Answer by  esteban (1334)

A rational number is any number that can be written as a fraction. Rational numbers are closed under addition and multiplication, and are dense.