Question

Before repairing a bike needs 4/5 hr per day servicing for 60 days.After repairing it need servicing same hr per day for 80 days. the time fraction save of servicing after repairing is?

Answer 1

servicing before repairs: 
60 days X 4/5 hour = 48 hours 

servicing after repairs = 80 hours 

difference in time: 
80 - 48 = 32 hours

I am not SURE