Formula for subtracting earlier time from later time in the 24 hour clock

I am trying to find a formula for finding the difference in hours and minutes btween a later time and earlier time in the 24 hour clock or military time.

An example would be 3:17AM or 03:17 minus 11:00Pm or 23:00 with the result displayed in hours and minutes.

The formula worked great! I could get it to work previously only by by using 27:07. But then when trying to total the times it would not work. This works fine now. Thank you very much!