
Nestor R. answered 03/24/20
Mathematically-oriented professional with many years of experience
The path is 3 1/3 mi long. This is the same as 10/3 miles or, by multiplying top and bottom by 2, 20/6 miles.
Ethan ran 5/6 of the distance. This is 5/6 of 20/6 miles or a distance of 5/6 * 20/6 = 100/36 ~ 2 7/9 miles.
Presumably Ethan walked the remaining 5/9 mile.
2 7/9 = 25/9 + 5/9 = 30/9 = 3 3/9 = 3 1/3, the length of the path.