Have you heard of the Rule of 72? Maybe if you go back to your college finance class? And even if you did remember it, you ...

If you've dabbled in investing, you've likely heard of the "Rule of 72." It's a back-of-the-envelope ... You'd likely need financial calculator or a spreadsheet to calculate the internal rate ...

Originally created by mathematician Luca Pacioli in 1494, the Rule of 72 is a simplified way to determine how many years it ...