21
Their GCF is 7 . I don't know what a GFC is.
7^2 - 3*7 49 - 21 28
7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, . . .
8/14, 12/21, 16/28, 20/35, 24/42, 28/49,...
7
The GCF is 7.
21
49 − 28 = 21 difference 21 / 28 x 100 = 75%
21, 28, 35, 42, 49
The GCF is 7.
49
It is: 49-28 = 21
Their GCF is 7 . I don't know what a GFC is.
GCF(20, 28) = 4
It is one.
They are: 21, 28, 35, 42 and 49