You can walk 2.5 miles per hour. how many hours will it take you to walk 12.5 miles?

12.5/2.5 divide the number of miles you need to walk by the number of miles you can walk in an hour to find how many hours you need to walk.

12.5 miles / 2.5 miles/per hour = 12.5/2.5 = 5 hours the miles cancel and you are left with 5 hours