This is true because 102 minutes is 1 hour and 42 minutes. If you add 1 hour and 42 minutes onto 6 hours and 45 minutes, the beginning time then. You would get 8 hours and 27 minutes.
This is my equation. ----> 6:45 +1:42 _____ 7:87 <---- But that isn't correct because 87 minutes is over an hour.
So if you do the correct numbers you would get 8:27 as your answer!
