A machine completes a job in 13 hours. What fraction of the job does it do in one hour?

A) 1/13

B) 1/14

C) 1/12

D) 2/13

Answer: A

Explanation: One hour’s share of a job equals 1 divided by the hours needed for the full job.
Using the values in this question gives 1/13 as the correct answer.