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20 September, 10:04

Greg has driven for 2 1/4 hours. Diana has driven for 3 1/5 hours, Abby has driven for 1 1/2 hours, and Jason has driven for 2 1/60 hours how many hours have they driven all together?

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  1. 20 September, 10:19
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    Step-by-step explanation:

    Greg has driven for 2 1/4 hours. Converting 2 1/4 hours to improper fraction, it becomes 9/4 hours.

    Diana has driven for 3 1/5 hours. Converting 3 1/5 hours to improper fraction, it becomes 16/5 hours.

    Abby has driven for 1 1/2 hours. Converting 1 1/2 hours to improper fraction, it becomes 3/2 hours.

    Jason has driven for 2 1/60 hours. Converting 2 1/60 hours to improper fraction, it becomes 121/60 hours.

    Total number of hours driven is

    9/4 + 16/5 + 3/2 + 121/60

    Taking 60 as the LCM and multiplying through by 60, it becomes

    (135 + 192 + 90 + 121) / 60 = 538/60

    Converting to mixed fraction, it becomes

    8 58/60 hours
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