Rational numbers
A rational number is any number that can be written as a fraction of two integers.
By definition, all rational numbers are also real numbers.
Notation
Section titled “Notation”The set of rational numbers is usually denoted by the symbol
Examples of rational numbers
Section titled “Examples of rational numbers”(can be written as ) (can be written as ) (can be written as ) (can be written as ) (can be written as ) (can be written as )
Non-examples of rational numbers
Section titled “Non-examples of rational numbers”(irrational) (irrational) (irrational) (not a real number)