4 students were scheduled to give book reports in one hour. after the 1st report, 2/3 hour remained. the next two reports too 1/6 hour and 1/4 hour. what fraction of the hour remained?

Question

Lucia Ponce

Mathematics

2 January, 00:09

4 students were scheduled to give book reports in one hour. after the 1st report, 2/3 hour remained. the next two reports too 1/6 hour and 1/4 hour. what fraction of the hour remained?

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Porky · Answer 1

After the first, we have 2/3 left, the second and third took 1/6 and 1/4, or 5/12 (1/6+1/4=2/12+3/12 = (2+3) / 12=5/12). Now, we just subtract 5/12 from 2/3, so 2/3-5/12=8/12-5/12 = (8-5) / 12=3/12=1/4. This means we have 1/4 of an hour left.