The answer is eleven thirty-sixths.
5 minus 5 sixths is 4 and one sixth.
It is: 1 -5/6 = 1/6
Two minus 5/6 is 1 1/6
1- 18th
It is: 13/12
7 1/3 minus 5 5/6 is 1 1/2
5/6 minus 7/12 is 1/4.
5/6 - 1/2 = 2/6 --> 1/3
1/3 is the same as two sixths, so 5/6 - 2/6 = 3/6 ie 1/2
81/4 - 55/6 = 33/4 - 35/6 = 99/12 - 70/12 = 29/12 or 25/12
8 and 3/6 minus 6 and 5/6 = 5/3