Let's first figure out the number of minutes from 11am (11:00 hours) to 2pm (14:00 hours) :
14-11 = 3 hours. This is equal to 75% of the total time, t.
Note: 75% = 75/100
3 hours = (75/100) x t
t = (3 hours)/(75/100) = 4 hours
Therefore, your trip will end 4 hours after 11 am:
11:00+4= 15:00 hours which is the same as 3pm.