-3-(-11/9)
Let's follow PEMDAS and solve what's in the parentheses first.
-11/9= -1 2/9
Now, we have...
-3 - (-1 2/9)
Subtracting a negative from something is the same thing as adding it, so let's make our lives easier and change the equation to...
-3 + 1 2/9
That's easier! I think you can solve the rest...
-3 + 1 2/9