Nadine walked 1 4 of a mile, Janet walked 3 8 of a mile, and Perry walked 5 6 of a mile. Perry walked the farthest. Nadine = 6/24, Janet = 9/24, Perry = 20/24; Perry walked 7/12 miles more than Nadine.
The volume would be 167.344 cubic inches because 4.25 times 3.75 times 10.5 or 10 1/2 is 167.34375 but you would round so your answer would be 167.344 cubic inches.