13/15.
24 minus 1/6 is 23 5/6.
45/5 is 8 because 8x5=45. 8-2=6. So the answer is 6.
68
5/8 - 6/5 = 25/40 - 48/40 = -23/40 = -(23/40)
38/6 - 15/6 = 23/6 or 3 and 5/6
6/7 minus 1/5 is 23/35.
23 - 6 = 17
6/5 - (-2/9) 6/5 + 2/9= 64/45
32*5 - 6/2 = 9*5 - 6/2 = 45 - 3 = 42
4 + 4 * 6 - 5 = 4 + 24 - 5 = 28 - 5 = 23
81 - 6 - 45 - 12 = 18
45/6 ÷ 23/5 = 167/78