Question

Nancy and John each had worked 22¾ hours on a job when their foreman told them that they were 65% complete. How many hours are left on this job?

Answer 1

Answer: 24.5 hours are left on the job.

Explanation:

found the right answer:

2(22.75) = 65%x

2(22.75)

______ = x

65%

2(22.75)

______ = x

.65

x=70

70 - 2(22.75) =

70 - 45.5 = 24.5

Answer 2

12¼ hours

Explanation:

The complete work will be 100% so the combination of efforts of Nancy and John would require more hours.

Given that the duration of 22¾ represent 65% then using the concept of cross multiplication, we first get the total number of hours required for the whole task.

If 65% represent 22¾ hours then what would 100% represent?

65%=22¾

100%=x

X=100*22¾ /65=35 hours

Remaining hours will be 35-22¾ = 12¼ hours

Therefore, additional 12¼ hours are needed by Nancy and John