## rational number

rational number Number representing the ratio of two integers, the second of which is not zero. Thus, 1/2, 18/11, 0, −2/3 and 12 are all rational numbers. Any rational number can be represented as a terminating decimal (such as 1.35) or a recurring decimal (such as 18/11 = 1.636363….). See also irrational number

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## rational number

rational number (rational) Mathematically, a number that is fractional and is defined as the ratio of two whole numbers: the numerator (an integer) and the denominator (a strictly positive integer). In a/b, a is the numerator and b the denominator. See also rational type, real numbers.

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## rational number

rational number: see number.