How just how..........

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.
[tex] \dfrac{14}{11} = \dfrac{14 * 4}{11 * 4} = \dfrac{56}{44}[/tex]
[tex] \dfrac{7}{4} = \dfrac{7 * 11}{11 * 4} = \dfrac{77}{44}[/tex]
[tex] \dfrac{56}{44}-\dfrac{77}{44} = \dfrac{-21}{44} [/tex]
-21/44 That has to be your final answer.