STEP 1:
Set up a proportion
x= time to walk 2.5 miles
3.7 miles/ 1 hour= 2.5 miles/x
cross multiply
(3.7 * x)= (1 * 2.5)
3.7x= 2.5
divide both sides by 3.7
x= 0.6756756757
STEP 2:
find minutes
= 0.6756756757 * 60 minutes/hour
= 40.5405405405 minutes
ANSWER: It will take 40.54 minutes to walk 2.5 miles.
Hope this helps! :)