# rational number

- a number that can be expressed exactly by a ratio of two integers.

## Origin of rational number^{}

First recorded in 1900–05

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# rational number

- any real number of the form a / b, where a and b are integers and b is not zero, as 7 or 7/3

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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# rational number

- A number that can be expressed as an integer or a quotient of integers. For example, 2, -5, and 12 are rational numbers.

The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.