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-0.312 is a fraction. It is a fraction in decimal form rather than in the form of a ratio. However, that does not stop it being a fraction. And, being a decimal, there is no simpler form. Its rational equivalent is -312/1000 which can be simplified -39/125. But simplification means that you lose information about the precision of the fraction and end up with a fraction that may be more awkward to use.

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7y ago

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