Olivia has 1 1/5 yards of fabric. she uses 5/8 of the fabric to make a shirt. how much fabric did she use?

Make 1 1/5 into improper fraction which is 6/5 and then find the common denominator 6/5 and 5/8.
Common denominator is 40. Multiply 8 by 6 and 8 by 5 so it would become 48/40. Do the same with 5/8 except multiply by 5 which would be 25/40. Subtract 48/40 and 25/40 which is

23/40

What you do is add 11/5 and 5/8 so you will line those up and find out the common denominator which is 40 cause 5×8 is 40 so you put 40 for your denominator. next you figure out the numerator which will be 88 and 25 now since were adding your gonna take that 88 + 25 and you get 113/40 now you do 40÷113 and you get 17 and 33/40.
hope this helped