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Reduce the fraction. By my experience most will be repeating if the denominator is not 2,4,5,8, or 10 or.... MULTIPLE OF 10 and these same ones ..... like 20,40 etc., or a multiple of 100 and these same ones, etc

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Q: How do you know a fraction will be a repeating decimal?
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The fraction of the repeating decimal 0.7... is 7/9


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