Hi there!
For this problem, pretty much add all of them and then subtract with 22 to find how much Jen ran on Friday.
Monday+Tuesday+Wednesday+Thursday:
Simplify all terms and find all common denominators:
Common denominator: 8
Combine all terms:
Simplify 15 9/8 or else can’t subtract with 22.
Turn 22 into 21 8/8...
Subtract: 21 8/8 with 16 1/8
This means that 5 7/8 is how much mile Jen must run on Friday to reach her goal.