Manny runs 15 3/4 miles each week. Zander runs 5/6 as many miles each week as Manny.

How many miles does Zander run each week?

In these kinds of problems, take 15 and 3/4 (Manny's distance) and multiply it by the factor 5/6. (15 3/4 = 15.75)

(15.75) * (5/6) = 13.125 = 13 1/8

This should get you 13 and 1/8 miles for Zander's distance.