The LCM is 648.
The LCM of 3 and 4 is 12. The LCM of 5 and 15 is 15. The LCM of 24 and 36 is 72. The LCM of 24 and 81 is 648.
648
Since 648 is a multiple of 324, it is automatically the LCM.
It is: 36/648 = 1/18
0.0556
12 and 648
It is: 36
36
The LCM of 81 and 216 is 648.
1944
It is 648