https://moragify.com Moragify is the umbrella brand behind small, focused web projects -- starting with Cat Diary. This is the home page; individual projects live on their own subdomains. https://moragify.com/articles/percentage-calculator-vs-spreadsheet-vs-mental-math/ A percentage calculator, a spreadsheet, and mental math all give the same right answer to a clean question. The errors come from reversed discounts, percentage points read as percents, and base confusion. When each tool wins and the three traps behind most wrong answers. Mon, 13 Jul 2026 09:00:00 GMT https://moragify.com/articles/percentage-calculator-vs-spreadsheet-vs-mental-math/ https://moragify.com/articles/quick-mental-math-tricks/ Quick mental math tricks that beat unlocking your phone: the 10 percent anchor for tips, percentage flips, doubling and halving, and rough unit conversions you can trust. Thu, 09 Jul 2026 09:00:00 GMT https://moragify.com/articles/quick-mental-math-tricks/