You can convert the 5 hours to minutes, and then subtract. Or if, as is more likely, you want the answer to be in hours and minutes, you do the following: you "borrow" one hour, and convert it into minutes. In other words, 5 hours is the same as 4 hours and 60 minutes. From there, you can easily subtract 15 minutes.
It is: 24 hours minus 8 hours 15 minutes = 15 hours 45 minutes
3 hours 15 minutes minus 1 hour 35 minutes = 1 hour and 40 minutes
6 hours 15 minutes.
It is: 6 hours and 15 minutes
Subtracting 42 minutes from 15 hours 19 minutes gives 14 hours 37 minutes.
It is: 24 hours minus 8 hours 15 minutes = 15 hours 45 minutes
23 hours 15 minutes minus 45 minutes is 22 hours 30 minutes.
It is: 195 minus 24 = 171 minutes or 2 hours and 51 minutes
3 hours 45 minutes.
3 hours 15 minutes minus 1 hour 35 minutes = 1 hour and 40 minutes
6 hours 15 minutes.
It is: 6 hours and 15 minutes
Subtracting 42 minutes from 15 hours 19 minutes gives 14 hours 37 minutes.
35 hours 15 minutes.
The answer is: 6 hours and 15 minutes
6 hours 15 minutes = 375 minutes 2 hours 40 minutes = 160 minutes 375 minutes - 160 minutes = 215 minutes = 3 hours 35 minutes
5 hour 30 minutes