It is: 13.5
18
18/3 18 over 3 and....
5/6 - (3/1)/6 = 5/6 - 3/6 = 2/6 = 1/3
18.375 or 18 and 3 8ths
18
18.2
3/5 divided by 5/6 is 0.72 or 18/25
3 divided by 18 equals what = 0.16666666666666666
18
6
3
Three is the lowest common denominator. 21 divided by 3 = 7 54 divided by 3 = 18 21/54 = 7/18