Question

Factor the expression using the GCF.
100-80

Answer 1

Greatest common factor (GCF) of 80 and 100 is 20. GCF(80,100) = 20. We will now calculate the prime factors of 80 and 100, than find the greatest common factor (greatest common divisor (GCD) of the numbers by matching the biggest common factor of 80 and 100.