<span>The </span>greatest common factor<span>, or </span>GCF<span>, is the </span>greatest factor<span> that divides two numbers. To find the </span>GCF<span> of two numbers: List the prime </span>factors<span> of each number. Multiply those </span>factors<span> both numbers have in </span>common<span>. If there are no </span>common <span>prime </span>factors<span>, the </span>GCF<span> is 1.
Here's a link I have for a better explanation: https://www.khanacademy.org/math/pre-algebra/pre-algebra-factors-multiples/pre-algebra-greatest-comm... </span>
