Question

What is the greatest factor of 24 and 36

Answer 1

If you reduce them by 12 you'll get
$\frac{2}{3}$
If that's what you're asking

Answer 2

A greatest common factor, or GCF for short, is the largest number that can be divided into all numbers in a system.

The GCF for 24 and 36 is 12.

Other factors include 1, 2, 3, 4, and 6.