Answer:
2.75 miles
Explanation:
Given :you walked 5 miles down a trail and then walked 2 1/4 miles back
To Find :how many miles away are you from your starting point?
Solution :
He traveled distance form starting point = 5 miles
He then walked back and traveled distance =

Distance between starting point and current position= 5 - 2.25 = 2.75 miles
Hence you are 2.75 miles away from your starting point