24 1/10
- 5 9/11
------------------
We need a common denominator frot eh fractions. We can use 110.
24 11/110
- 5 90/110
---------------------
We can't subtract 99 from 11, so we need to borrow 1 from 24, leaving 23. We borrow 1 as 110/110 and add it to the fraction 11/110.
23 121/110
- 5 90/110
----------------------
18 31/110
24 1/10 - 5 9/11 = 18 31/110
