Steps to find the least common multiple of 12 and 18.

**Step 1 :** Divide 2 from number until it won't be able to go with it.

**Step 2 :** Divide 3 from number until it won't be able to go with it and continue this method until the reminder is 1.

**Step 3 :** The prime factorization of 12 and 18 is $2 \times 2 \times 3 \times 3$ or $2^{2} \times 3^{2}$.

**Step 4 :** LCM = $2 \times 2 \times 3 \times 3$ = 36