text: Home The Math Dude What Is the Least Common Multiple?
  Episode 131: November 30, 2012
  How do you find the lowest common denominator of the fractions 1/5 and 3/4? Well, all you have to do is find the least common multiple of the denominators of those fractions. Okay, but what exactly is a least common multiple? And, once you've found it, how exactly does it lead to the lowest common denominator? For that matter, since we've already learned about common denominators, why do we also need to learn about lowest common denominators? Whether you need a full-blown refresher on all things LCM and LCD or just a little tune-up, keep on reading because those topics are precisely what we'll be talking about today and over the next few weeks.