Their GCF is 7 .
I don't know what a GFC is.
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No idea what the gfc is but GCF(35, 45) = 5.
7
The greatest common factor (GCF, not GFC) of 315, 105 and 21 can be calculated by writing down each number's factors. The factorization for the given numbers is: 315 = 3 x 3 x 5 x 7 105 = 3 x 5 x 7 21 = 3 x 7 The common factors are 3 x 7 = 21, so the GCF of 315, 105 and 21 is 21.
21 is 35% of 60
It is: (21+35)/2 = 28