Respuesta :
1 more hour since he walked 3/4 of the trail and he walked 3 hours. So it’s 1 hour :)
I don't think this might be very helpful, but I know that 3/4 of one hour is 45 mins, because you multiply 60 mins, which is an hour, by 3/4. So if you would do that but with 3 hours, you would get 2 hours and 25 mins? Hopefully this helped a bit.