Respuesta :
You need to find the biggest number that is a factor of both 8 and 20. Factor's are whole numbers that can be multiplied by other whole numbers to get that number.
Factors of 8
1, 2, 4, 8
Factors of 20
1, 2, 4, 5, 10, 20
The greatest common factor is 4
Factors of 8
1, 2, 4, 8
Factors of 20
1, 2, 4, 5, 10, 20
The greatest common factor is 4