Step One
Change to improper fractions.
1 3/11 = 14/11
1 3/4 = 7/4
Step Two
Find the common denominator
11 = 11 * 1
4 = 2 * 2
The common denominator = 11 * 2 * 2 = 44
Step 3
change the improper fractions to the common denominator.



-21/44 That has to be your final answer.