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A number capable of being expressed as an integer or a quotient of integers, excluding zero as a denominator.
(Mathematics) any real number of the form a/b, where a and b are integers and b is not zero, as 7 or 7/3
a number that can be expressed exactly by a ratio of two integers.
A number that can be expressed as an integer or a quotient of integers. For example, 2, -5, and 1/2 are rational numbers.