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Is .21 (with only the one repeating) a rational number? please explain why! thanks!

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21 is a rational number because it is an integer, which can be converted into a fraction.

Explanation:

When a denominater and numerator are integers and gives a quotient then it is a rational number.

21/1, where 21 is denominator and 1 is numerator the quotient is 21. Therefore 21 is a rational number which can also be considered as a ratio.

User Jake Wharton
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