Answer:
1
Explanation:
12- 9 1/4 = 2 3/4
9 1/4 - 2 3/4 = 6 1/2
6 1/2 - 2 3/4 = 3 3/4
3 3/4 - 2 3/4 = 1
You can always convert all of these fractions to have like denominators, then you can make them improper fractions. You can then convert then back after you have subtracted them from each other.
If this is not what you were looking for, I will try to help you understand. :)