Step 1: Find a common denominator for the fractions.
The least common multiple of 4 and 3 is 12.
Step 2: Convert the fractions to have the common denominator.
43=4×33×3=129
31=3×41×4=124
Step 3: Add the converted fractions.
129+124=129+4=1213
The sum of the fractions is 1213.
That's 2 down. 3 left today — send the next one.