There is an infinite number of common denominators, but 12 is the least common denominator. You could also use any other number that is a multiple of 12, such as 24, 36, and 48.
12 is the least common denominator because it is the smallest number that is a multiple of both 4 and 6.
[tex]4*3=12[/tex]
[tex]6*2=12[/tex]
You can also use any other multiples of 12 because they are all multiples of 4 and 6.
