How to Calculate Percentages: 5 Formulas for Everyday Math
Calculate a percentage of a number, percent change, and original prices before discounts or tax, with worked examples and mental-math shortcuts.
Everyday Math
Percentages, discounts, unit conversions, file sizes, and date math, with worked examples you can check by hand.
Percentage Points vs Percent: What's the Difference?
Learn the difference between percentage points and percent change, with examples, basis points, compounding, and why a 50% loss needs a 100% gain.