Answer: Each runner will run 7/16 miles.
Explanation:
Divide the number of miles among the number of runners to find out how far each runner will run 
So there are 4 runners and the distance is 1 3/4 miles long so divide 1 3/4 by 4 to solve for the situation. 
1 3/4 = 7/4 
 = 7/16
 = 7/16