SOLUTION: if a man can do a piece of work in 15 days what part of work does he finish in 1 day? in 3 days? in x days? in 15 days?

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Question 898608: if a man can do a piece of work in 15 days what part of work does he finish in 1 day? in 3 days? in x days? in 15 days?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Proportion exercise.

1 piece of work in 15 days.
%281%2F15%29%28job%2Fday%29.
Your first question is %281%2F15%29 of the job.

How much of the piece of work in 3 days?
highlight_green%281%2F15=j%2F3%29 for j jobs in 3 days.
j=%281%2F15%29%2A3
highlight%28j=1%2F5%29 of the job.

You can answer the next two questions, because you already see what is variable and where it is positioned in the proportion.