Elapsed time is 2 hours and 37 minutes and the end time is 1:15 what is the start time

Answer 1

1:15 - 2:37 = 13:15 - 2:37 = 12:75 - 2:37 = 12:38

Answer 2

well take 2 hours from 1:15
that would be 11:15
then take another 30 minutes off
that would be 10:45
then another 7 min off
10:38
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Check
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10:38 + 2:37 = 12: 75 = 1:15 sure enough

Answer 3

oobleck meant 10:38
12:75 - 2:37 = 10:38

Answer 4

yes, i did. thanks for the catch :-(