The greatest common factor of two numbers is equal to the product of common factors of both the numbers.
factors of 28 = 2 x 2 x 7
factors of 75 = 3 x 5 x 5
Common factors of 28 and 75 = 0
So, there is no greatest common factor of 28 and 75.
factors of 28 = 2 x 2 x 7
factors of 75 = 3 x 5 x 5
Common factors of 28 and 75 = 0
So, there is no greatest common factor of 28 and 75.