Respuesta :

Greetings!

"What is the LCM of two numbers if one number is a multiple of the other"...

The LCM (The Lowest Common Denominator) would be the number itself, multiplied by one.

For Example:
3/4+3/20

Multiples of the Denominators:
4:4,8,12,16,20,24
20:20,40

4*5=20
20*1=20

The LCM would be 20.

Hope this helps.
-Benjamin