Respuesta :

legendman27
45 is the common denominator
because 15 * 3 = 45
and        9 * 5 = 45

this is the lowest number 9 and 15 have in common
Salutations!

You need to find the LCM, or LCD (Least common denominator)

We need to find least common multiples of 15 and 9.

[tex]15*3=45[/tex]

[tex]9*5=45[/tex]

The LCM of 15 and 9 is 45.

Hope I helped (:

Have a great day!