Because it doesn't equal an integer, it will be written like 11/20 or 0.55. Such as if you try to divide 15 into 20, you'll either get 3/4 or .75 because 15 can't be equally divided into 20.
1 over 120
0.1
1.8
0.21875
0.0333
0.139
72 divided by 36/12 = 24.
3 over 8
10/9
8. Why? are you cheating?
24.5
13/5