Answer:
5/9 is remaining
Explanation:
Start with 5/6 full. The farmer sells 1/3 of this amount, or:
(5/6)*(1/3) = (5/18) is sold.
This is deducted from the (5/6) full that the problem started with.
(5/6) - (5/18) =
Find a common denominator. Lets use 18:
(3/3)*(5/6) - (5/18) =
15/18 - 5/18 = 10/18 or 5/9 is remaining