SOLUTION: Seven people can do 1/3 of a job in 45 days. How many additional people must be hired to complete the remaining 2/3 of the job in 42 days? (Assume everyone works at the same rate.)

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Question 824823: Seven people can do 1/3 of a job in 45 days. How many additional people must be hired to complete the remaining 2/3 of the job in 42 days? (Assume everyone works at the same rate.)
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
7 people can do 1/3 of a job in 45 days.
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It will take 14 people to do 2/3 of a job in 45 days
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1 person does 2/3 of a job in +15%2A45+=+630+ days
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+15%2A1+=+15+ people do 2/3 of a job in +630%2F15+=+42+ days
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There are already 7 people working, so +15+-+7+=+8+
more people are needed