Rational Numbers, class of
numbers that are the result of dividing one integer by another. Integers are the
negative and positive whole numbers (… -3, -2, -1, 0, 1, 2, 3, …). The numbers
’, 5 (5/1), and –1.4
(-7/5) are therefore rational numbers because they are quotients (results of
division) of two integers. Rational numbers are a subset of the real numbers,
which also include the set of irrational numbers. Irrational numbers are numbers
such as pi (p), the square root of two
(Ã), and the
mathematical constant e that are not the quotient of any two
integers.
All rational numbers can be written as decimal numbers.
The decimals may have a definite termination point (such as 5 or 3.427) or they
may endlessly repeat in a pattern (such as 1.8888… or 2.18181…).
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