Understanding fractions is a critical mathematical ability, and yet it's one that continues to confound a lot of people well into adulthood. New research finds evidence for an innate ratio processing ...

Meghan is an associate editor with EdTech. She enjoys coffee, cats and science fiction TV. From the abacus to the slide rule, tools for calculating have been around since ancient times. But it wasn’t ...

Daniel McNulty began writing for Investopedia in 2012. His work includes articles on financial analysis, asset allocation, and trading strategies. Andy Smith is a Certified Financial Planner (CFP®), ...