Greatest Common Factor of 15 and 21

2 answers

Help is NOT a good title for this post. It should be Math, etc.

Sra
http://www.math.com/school/subject1/lessons/S1U3L2GL.html

http://www.helpwithfractions.com/greatest-common-factor.html

Note that you're looking for the GREATEST common factor, not the LEAST common factor.
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