First you must make each fraction have a common denominator so you can add/subtract them. Times each by a number that is equal to one so it does not change the value of the equation.
1/2*3/3=3/6
1/3*2/2=2/6
Now you have a + 2/6 > 3/6
Then subtract 2/6 from 3/6
a > 1/6
This is the answer