1/6
Working
1/2-1/3
Firstly, make the denominators equal.
1/2 is multiply by 3 to both numerator and denominator.Therfore, it would be 3/6.
Secondly , 1/3 is also multiply by 2 to both numerator and denominator. Therefore , it would be 2/6
3/6-2/6 would be 1/6.
Your final answer would be 1/6 (1 by 6)