Question 110642

Find the least common denominator for fractions with denominators 9 , 12 , and 16

Method to find {{{LCM}}}:
Factor the numbers into products of powers of prime numbers.  
Create a new number multiplying together all the primes occurring in 
either number, raised to the higher of the two exponents.  That is the 
LCM.



factor number{{{ 9}}}:

{{{9 = 3 * 3}}}

factor number {{{12}}}:

{{{12 = 2 * 2 * 3}}}

factor number {{{16}}}:


{{{16= 2 * 2*2 * 2}}}

{{{LCM = 2 * 2 * 2 * 2 * 3 * 3 =144}}}