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7 February, 01:49

What is (4/9-7/15) divided by 13/10

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  1. 7 February, 03:50
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    First find least common denominator to subtract.

    9 = (3) * 3

    15 = (3) * 5

    3*3*5=45 is lcd

    4/9=20/45

    7/15=21/45

    (20/45-21/45) = (20-21) / 45=-1/45

    -1/45:13/10

    multiply by reciprocal instead of dividing

    -1/45*10/13 = (1*10) / (45*13)

    -10/585
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