Answer:
85.7%
Step-by-step explanation:
Note that the requirements is that workers complete one form in 60 seconds, in one hour they have completed 60 forms x 60 minutes= 3600s for 60 forms.
But Les case is different, he can complete one form in 70 seconds, implying that in one hour he completes
70 seconds x 60 minutes= 4600 seconds. ie (3600/70= 51.43 seconds per form)
The percentage difference is calculated by dividing the amount Les can complete in an hour by the workers standard x 100
(51.43/60 = 0.857 x 100 = 85.7%
Thus, Les is 85.7% efficient with the standards set by his employer.