The use GCF method is correctly illustrated recursively below
The GCF is the greatest common factor that can be used to correctly divide two or more numbers without a reminder.
For example,
The parameters 20 and 30, to know the greatest common factor, write out each factors of 20 and 30
The factors of 20 = 1, 2, 4, 5, 10, and 20
The factors of 30 = 1, 2, 3, 5, 6, 10, 15, and 30
Therefore the GCF = 10
Learn more about factors here:
https://brainly.com/question/219464
#SPJ1