The LCM of 2 and 12 is 12. Because 12 is a multiple of 2, it is automatically the LCM of the pair.
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The least common denominator of fractions is the smallest multiple of the denominators that they both share. To find the least common denominator of 2/3 and 7/12, you need to find the least common multiple of 3 and 12, which is 12. Therefore, the least common denominator of 2/3 and 7/12 is 12.
To find the lowest common multiple you must have at least two numbers.
LCM in math means least common multiple. So, for example, in the case of 2 and 18, the least common multiple is 18 because that is the lowest valued number that both 2 and 18 share. An another example is the case of 5 and 12. The least common multiple will be 5 times 12, because 5 and 12 do not have any common factors.
The least common multiple of 3 , 2 , 5 = 30
The least common multiple of 2 , 5 , 9 = 90