Question

What Is the least common multiple of two numbers when one number is a multiple of the other give an example

Answer 1

Like 9 and 9? 9 is a multiple of 3 and 9 time 9 is 81

Answer 2

A common multiple is a number that is a multiple of two or more numbers.

For example: Common multiples of 2 and 3 are 0, 6, 12, 18, ...

So, If one number is the multiple of the other, the bigger number will be the LCM  

For example 6 is a multiple of 3.  Therefore LCM of 3 and 6 is 6

hope his helps!