Your 3 divided by 1.8 = 1.6666... on a calculator, and it is 1 2/3 exactly.
3 divided by 18 equals what = 0.16666666666666666
18
3
18 can be divided by 3 18 can be divided by 9 45 can be divided by 9 45 can be divided by 3
6
18
6
3
18
18
12-18 divided by 2 is 3.
3/4 divided by 18 is 0.041666