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Mathematics 19 Online
OpenStudy (anonymous):

fractions: jack spends 1 2/5 as long on his homework as jill, last week, jill spent 7 3/4 hours doing homework how long did jack spend doing homework? (my answer) 12 11/12 hours the week before,jack spent 18 3/4 hours doing homework, how long did jill spend doing homework?

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