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It is: 9
gcf of 115 and 207 is 23.
gcf of 138 and 207 is 69.
The GCF is 1.
The GCF is: 1
The GCF is 9.
23 115/23=5 207/23=9
The GCF is 45.
The GCF is 20.
The GCF is 4.
The GCF is 10.