The GCF of 27 and 99 is 9
3 x 9 = 27, 11 x 9 = 99
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The greatest common factor of 55 and 99 is 11.The GCF of 55 and 99 is 11.
The greatest common factor is 9
The greatest common factor of 54 and 99 is 9, which is not prime. The greatest common factor of 80 and 114 is 2, which is prime.
99
The greatest common factor of 21 and 99 is 3. 21's factors are 1,3,and 7 99's factors are 1,3,9,11 33 (there may be more factors of 99). The highest factor that both number have in common are 3.