I assume that the values appearing after the equal signs for Riverwalk, Mountainview, and Pine are the distances in miles. For Dylan who hiked Riverwalk and Mountainview, the total distance covered is, 3/4 + 1/2 = 5/4 or 1.25 miles For Sonia who hiked Mountainview and Pine, the distance covered is, 1/2 + 3/5 = 11/10 or 1.1 miles