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6 September, 02:01

Jack spends 1 2/5 as long on his homework as Jill. Last week, Jill spent 6 3/4 hours doing homework. How long did Jack spend doing homework?

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  1. 6 September, 02:08
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    6 3/4 hours = (6*60) + 45 = 405 minutes

    7/5 = 1,4

    405 minutes * 1,4 = 567 minutes

    = Jack spent 9 3/4 hours
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