## Math Basics## All About Numbers |

## What are rational, irrational, and real numbers? |

*Rational,* or fractional, numbers are most often regarded as divisions (or ratios) of integers. By creating a fraction (dividing one integer by another), a rational number produces either a number that “ends” or repeats decimals. For example, 1/4 equals the decimal equivalent of 0.25; 1/3 is equivalent to 0.33333 … Both of these are rational numbers. (For more information about fractions, see below.)

On the other hand, *irrational numbers* are all the numbers that can be written as non-repeating, non-finite (or non-terminating) decimals. Also called non-rational numbers, they include the decimal equivalent of pi (or 3.141592 …). Finally, if you put the rational and irrational numbers together, they form the *real numbers.* Most numbers we use in our everyday lives are real numbers.