Greatest common factor of 9 and 99
The greatest common factor of 9 and 99 is 9. The greatest common factor is the factor that divides two numbers. In a case where two numbers don't have common prime factors, the GCF is 1.
Maybe you should do your own homework. If you need help with this problem, you should definitely do your own homework.It's NINE by the way.
GCF = 9