1) 8 - 3 2/7 = 8 - 23/7 = 56/7 - 23/7 = 33/7 = 4  6/7

2) 5 6/13 - 2 = 71/13 - 2 = 71/13 - 26/13 = 45/13 = 3  6/13

3) 2  3/14 - 1 = 31/14 - 1 = 31/14 - 14/14 = 17/14 = 1  3/14