How to calculate percentages is easier than you think. Quick, what’s 36% of 25? Or how about 250% of 20? Learn a quick and dirty tip to help you calculate all of those pesky percentages in your head.

At times, while working on an Excel sheet, we run into a situation where we require using Windows Calculator to perform quick calculations. The calculations do not necessarily require a special ...

Learn to calculate present value (PV) in Excel using rate and period inputs for better investment comparisons and informed financial decisions.

Scientific American presents Math Dude by Quick & Dirty Tips. Scientific American and Quick & Dirty Tips are both Macmillan companies. Long time math fans may remember our first foray into the world ...