Answer: ⅔miles
Step-by-step explanation:
Since the fourth graders walked 2 1/6 miles during PE while the fifth graders walked 1 1/2 miles.
The number of miles further that the fourth graders walk than the fifth graders will be the difference between the number of miles walked which will be:
= 2 1/6 - 1 1/2
= 2 2/12 - 1 6/12
= 8/12
= 2/3
Therefore, the fourth graders walked ⅔miles more than the fifth graders.