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What are rational numbers

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A rational number is a number that can be written as a fraction or "ratio".
It includes the set of integers because all of them have a denominator of 1. A rational number can take on the form of
(a)/(b) where b ≠ 0. Terminating and repeating decimals are rational numbers because they too can be written as a ratio; for example, 0.3 =
(3)/(10) or 0.3333... =
(1)/(3).
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