answersLogoWhite

0

Prime factor each number.

18=2x3x3

45=3x3x5

72=2x2x2x3x3

Use each prime factor the number of times it was used the MOST in any one of the numbers.

2x2x2x3x3x5=360

The least common denominator of 18, 45, and 72 is 360.

User Avatar

Wiki User

10y ago

What else can I help you with?