I’ll do an example problem, and I challenge you to do this on your own!
If the example is find the difference between 0645 and 1200, we know that there are 60 minutes in an hour, so 0645 is 6 hours and 45 minutes or 6+45/60=6+3/4 of an hour by dividing both the numerator and denominator by 15. Finding that in minutes, we have 60*6+45=360+45=395 minutes due to that you add 60 minutes for every hour.
1200 is just noon, but that’s 12 hours, so we can convert that into minutes - 60*12=720
Finding the difference, we get
720
-395
_____ due to that -395=-400+5, so 720-400=320 and 320+5=325
325
Converting them back into hours, we get 325/60=5+25/60, which is 5 60 minute increments (5 hours) and 25 minutes, or 0525
Good luck, and feel free to ask any further questions!
