PERCENTAGE BY XUNGLEE

About Percentage

Last updated: 16 October 2026

Percentage by Xunglee offers ten free tools for everyday percentage questions: discounts, changes, markup, margin or a portion of a number.

Clear numbers, without extra steps

Enter two values for an instant answer. Every tool includes a formula, worked example and practical questions to help you understand the result.

How we calculate

All calculations run in your browser using JavaScript. Formulas and restrictions are explained on each page. Percentage difference uses the mean of two non-negative quantities; relative increase and decrease use the signed starting value.

Accuracy and availability

Results display up to 12 significant digits. JavaScript floating-point arithmetic approximates some decimals and large integers. Round monetary results to your currency’s precision.

Free and accessible

No account or payment is required. Inputs stay in your browser. The tools support keyboard navigation and do not depend on optional analytics or advertising.

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Contact

Questions about this site or your privacy? Contact info@xunglee.com.