# In this Section:

In this section, we learn how to find the Least Common Multiple which is abbreviated as LCM. We begin by simply learning the basic definition for a multiple.
In this context a multiple comes from multiplying a number by a non-zero whole number. For example, the first few multiples for the number three would be: 3, 6, 9, 12, 15, 18, 21,… We then learn that when
two numbers have a multiple in common, it is known as a “common multiple”. Our goal is to find the least common multiple, or in other words a multiple that is common to a group of numbers with the least value.
We will learn two unique ways to find the LCM. The first method is by listing the multiples of each number and searching for the LCM. The second and more practical method builds the LCM from the prime factorization of each number.