It is: 360 by finding the prime factors of 24 and 90
2 x 2 x 2 x 3 = 24
2 x 3 x 3 x 5 = 90
2 x 2 x 2 x 3 x 3 x 5 = 360, the LCM
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LCM(90,84) = 1260
LCM for 45 and 90 is 90.
The LCM is: 24
To find the LCM, you need to have the denominators equal to each other. In this case the LCM is 90, so the fractions are as follows: 45/90 40/90 and 54/90.
The LCM is 90.