If you would like to find the elapsed time between 10:30 p.m. and 1:15 a.m., you can calculate this using the following steps:
12:00 p.m. - 10:30 p.m. = 1:30
00:00 a.m. + 1:15 a.m. = 1:15
1:30 + 1:15 = 2:45 = 2 hours and 45 minutes
The correct result would be 2 hours and 45 minutes.