Hello! So a mixed number is being subtracted by an improper fraction. To find the difference between the two numbers, we will subtract. It would be set up as 4 5/8 - 3 7/8. First off, because 5/8 is less than 7/8, we add 8/8 to 5/8 and turn 4 into 3. That makes the problem 3 13/8 - 3 7/8. Now, let's subtract. 3 13/8 - 3 7/8 is 6/8 or 3/4 in simplest form. There. Tara read 3/4 more pages of the arts section than the sports section.