The gcf of 80 and 48 can be obtained like this:
The factors of 80 are 80, 40, 20, 16, 10, 8, 5, 4, 2, 1.
The factors of 48 are 48, 24, 16, 12, 8, 6, 4, 3, 2, 1.
The common factors of 80 and 48 are 16, 8, 4, 2, 1,
intersecting the two sets above.
In the intersection factors of 80 ∩ factors of 48 the greatest element is 16.Therefore, the greatest common factor of 80 and 48 is 16.