20 minus 17 minus 3 minus 2 equals -2
15/20 minus 6/20 which is 9/20 or 0.45
19/20 minus 3/10 = 13/20
13/20 minus 3/5 is 1/20
It is: 8 and 3/8 minus 20 and 3/4 = -12 and 3/8
14/20 minus 3/5 is 1/10
23 - 3 = 20
100/20 - 3 = 2
20 + 15 - 3 = 32
3/4 minus 1/10 is 13/20
13/20 - 3/15 = 9/20
Converting to twentieths, we get 8 over 20 minus 15 over 20, resulting in minus 7 over 20.