Answer:
10:21 am
Step-by-step explanation:
It would be easier to work with a 24 hour clock format.
3:08 pm in this format would be 15:08.
Subtracting 4 hours from this time would result in 11:08.
We can start by subtracting 8 from the minutes to get 11:00 (That's simply how I like to calculate time, it's not necessary whatsoever). We now have to subtract an additional 39 minutes (47 - 8 = 39) from 60 to get the time in minutes. We should also subtract 1 from the hours as we're moving down to the previous hour.
60 - 39 = 21 (minutes).
11 - 1 = 10 (hours).
4 hours and 47 minutes before 3:08 pm is 10:21 am.