Explanation:
1/3 with both sides multiplied by two in order to have same denominator of both fractions, which is 6.
(1/3) x (2/2) = 2/6
Replacing 1/3 with 2/6,
the [ 1/3 - 5/6] becomes [2/6 - 5/6]
2/6 - 5/6 = -3/6
Simplify -3/6 by dividing both sides with 2,
-3/6 becomes -1/2
ANSWER: -1/2