4.5
Estimating this might be done by saying that a number that is just a little short of ten (9 5/6) is divided by a number that is a little more than 2 (2 1/8). Since ten divided by two is five, a number a little less than ten divided by a number a little more than two is going to be a number a little less than five.
23/24
14 divided by five sixths = 84/5 or 164/5
6
One sixth
3/4
165
about 18.1
one eighth of a three fourth
0.08333333333
11.5
7/12
Three and one third divided by five sixths = 4/1 or 4