79 is a Prime number. There is no common factor (other than 1) with 38 (whose prime factors are 19 and 2)
The GCF is 1.
The GCF of 38 and 76 is 38. Since 38 is a factor of 76, it is automatically the GCF.
It is: 79-38 = 41
The GCF is 2.
The GCF is 38.
The GCF is 1.
The GCF is 1.
Subtract 38 from 79: 79-38 = 41
The GCF of 38 and 76 is 38. Since 38 is a factor of 76, it is automatically the GCF.
It is: 79-38 = 41
The GCF is 4.
The GCF is 2.
The GCF is 2.
The GCF is 22.
The GCF is 2.
The GCF is 38.
The GCF is 1.