Question

Ending 7:43 elapsed time 37 minutes

Answer 1

If you ended at 7:43 and 37 minutes passed then:
43 - 37 = 6
7:06 was your start time

Answer 2

Starting time:
Ending time: 7:43

Elapsed time: 37 minutes.

We are 43 minutes into 7 o'clock. 37 minutes ago, it would have been 43 - 37, or 6 minutes.

The starting time is 7:06