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A rational number is a number that can be expressed as a/b. a and b must both be integers. For any finite decimal, you can multiply by a power of 10 to get an integer. In this case, you can multiply by 1,000 to get 682. Therefore, 0.682 can be expressed as 682/1,000. This is why 0.682 is rational.
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Earn +20 ptsQ: Why is 0.682 rational?
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