There are some schools of thought that maintain that a fraction can have an LCM. For our purposes, we find the LCM of the denominators to discover a least common denominator. The LCM of 9 and 15 is 45.
180
36
36
The LCM of 8 and 15 is 120
LCM(9, 4) = 36.
The LCM of 49 and 84 is 588.
The Least Common Multiple (LCM) of (15,3) is 15
60
For 12, 15 and 28 the LCM is: 420
120
The LCM is: 90
The LCM is: 90