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8 August, 16:04

Jessie is building a doghouse. For one side of the roof, she needs a board that is 7 3/4 feet long. She has a board that measure 9 1/12 feet. How much of the length does she need to cut from the board? Show your work and simply the fraction.

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  1. 8 August, 16:52
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    9 1/12 ft = 109/12

    7 3/4 = 31/4

    You need to give them the same denominator, so you'll need to multiply the top and bottom of 31/4 by three

    109/12 - ((31*3) / (4*3)) = x

    109/12 - 93/12 = x

    (109-93) / 12 = x

    16/12 = x

    (16/4) / (12/4) = x

    4/3 = x

    4/3 = 1 1/3

    Jessie needs to cut 1 1/3 feet off the board.
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