-3 1/2 + (-2 3/4) is the same as -3 1/2 - 2 3/4 because + and - make a -.
Now, find a common denominator. 4 in this case.
Convert the mixed fractions into standard form.
-14/4 - 11/4 Subtract. = -25/4 = -6.25
There another way to do this. You can simplify the mixed fraction into a standard form first = -7/2 - 11/4 Then find a common denominator which is 4. = -14/4 - 11/4 = -25/4 = -6.25