To find the LCM, just keep multiplying until you find the answer
3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36
12, 24, 36
18, 36
36
12
The LCM is: 57
15
It is: 120
12
30
63
63
It is 12
The Least Common Multiple (LCM) for12 9is36
12/18 = 2/3
The LCM is 12.