8 7/12 - 2 5/8 3 7/12-11/3
8 7/12 - 2 5/8=103/12-21/8=206/24-63/24=143/24=5 23/24 3 7/12-11/3=43/12- 11/3=43/12- 44/12=-1/12
8 7/12 - 2 5/8 = (206-63)/24 = 143/24 = 5 23/24 3 7/12-11/3 = (43-44)/12 = - 1/12