About this project
I built this because "what's 15% of 240" and "what's the % change from 80 to 92" keep coming up, and most calculators just print a number. This one has three modes (X% of Y, X as a % of Y, and percentage change) and shows the working. The page also explains the traps:
- A 50% loss needs a 100% gain to recover.
- Percentage points aren't the same as percent.
- Two 10% rises make 21%, not 20%.
It's free, with no ads in the way and no sign-up. It's part of Web Tool Bench, a side project of 33 small web tools.
@webtoolbench
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