# How do you find the LCM of 7 and 9?

In arithmetic, the least common multiple or LCM of two numbers say a and b, is denoted as LCM (a,b). And the LCM is the smallest or least positive integer that is divisible by both a and b.

LCM of 7 and 9

First find the prime factorization of 7
7 = 7 X 1
Then find the prime factorization of 9
9 = 3 × 3
Multiply each factor the greater number of times it occurs in above steps above to find the LCM:

LCM = 3 × 3 × 7
LCM = 63
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