A concert started at 4:30 PM And ended at 6:15 for you how long was the concert
6:15 - 4:30
= 5:75 - 4:30
= 1:45
If you have a half-decent calculator, you should have a key labelled "D°M'S"
enter:
6
D°M'S
15
-
4
D°M'S
30
=
my calculator gives me 1°45'0
which I interpret at 1:45