Math help for expkanation pls?

Yan takes 3 h 45 min to travel from Town A to Town B. He reaches Town B at 1. 30 pm. At what time does he leave Town A?

Reaching Time to Town B = 1.30 PM =13.30 hours
Starting Time from A = 13.30 - 3.45 =9.45 AM..................Ans

If he arrives at 1 30 PM and it took him 3 hours and 45 minutes to get there, that means he left 3 hours and 45 minutes ago. You just have to subtract 3 hr 45 min from 1:30 PM. 9:45 AM is the answer.

1:30 - 3 hrs = 10:30am

10:30am - 45min = 9:45am

Yan takes 3 h 45 min to travel from Town A to Town B.
He reaches Town B at 1. 30 pm.
At what time does he leave Town A?
Yan leaves Town A at 9. 45 am.