Julie ran 7/8 of a mile. Kelly ran 1/3 of a mile.. How much farther did Julie run?

First convert the distance she ran from a mixed number to a improper fraction:

2-3/4 equals 11/4.

Since this a unit rate problem divide the miles by the time traveled.

11/4 (miles) ÷ 1/3 (hour). When you divide a number by a fraction use (Keep-Change-Flip).

11/4 × 3/1 = 33/4 miles/hour.

Convert improper fraction to mixed number by dividing 33 by 4.

33/4 = 8-1/4 miles/ hour.