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Math

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Althea took two sets of tests. The first test took her was 4/5 of an hour and the second test for 8/7 hours . How much longer did she take the second test ?

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Semsam123viz Semsam123viz

4/5 - 8/7 cannot be subtracted since they don't have the same denominator.

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Peridot1608viz Peridot1608viz

since 8/7 and 4/5 are not the same denominator you should get the LCD which is 35. so the answer 12/35

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