Whats -1/2 + 3(9/11)
To ADD or SUBTRACT fractions, you will need to have a COMMON DENOMINATOR
22 is common to 11 and 2
-1/2 x 11/11 = -11/22
3 (9/11) = 42/11 42/11 x 2/2 = 84 / 22
Now you can add them
-11/22 + 84/22 = (-11+84)/22 = 73/22 = 3 7/22
+37091 
