DefinitionLeast common multiple Common multipleicode: en is the smallest positive or zero value lcm(x, y)(lcm(x,y)) that is a multiple of (divisible by) both x and y. The LCM finds application in several mathematical operations such as sum and difference of fractions respectively with diverse denominators, in the problems that repeat cycles in nature. Eg: LCM of 4 and 6 = 12 as 12 is the minimum number which is the factor of both 4 and 6.