Percentage Calculator

Tool

About

This utility provides a straightforward way to calculate percentages, allowing users to add or subtract a percentage from a given number. All calculations are performed client-side using JavaScript, ensuring instant results and user privacy. The core mathematical operations involve converting the percentage to a decimal (e.g., 10% becomes 0.10) and then applying it to the base number. For adding a percentage, the formula is `Base Number + (Base Number * Percentage / 100)`. For subtracting a percentage, the formula is `Base Number - (Base Number * Percentage / 100)`. This makes it ideal for various practical applications such as calculating discounts, taxes, tips, or understanding financial changes.