Percentage Calculator

Percentages show up constantly in daily life — a 20% restaurant tip, a 15% discount at checkout, a raise from $52,000 to $56,000, or a stock that dropped 8% in a week — yet doing the math by hand is where most people slip up, especially with compound changes or reversing a percentage back to a base number. The Percentage Calculator handles the arithmetic instantly and shows the steps behind the answer, so you're not just getting a number but understanding how it was derived. It's built for anyone who needs a quick, reliable answer without pulling out a calculator app and re-deriving the formula from memory.

The tool covers the core percentage operations people actually search for: finding what a percentage of a number is (e.g., what is 15% of 80), calculating percentage change between two values (from X to Y), and working out increases or decreases by a given percent. Each result comes with a step-by-step breakdown that lays out the formula and the intermediate calculation, which makes it useful not just for getting an answer but for checking your own manual work or explaining the result to someone else, such as a student working through homework.

Since everything runs client-side in your browser, there's no upload, no account, and no delay waiting on a server round-trip — you type the numbers and see the result and its breakdown immediately. This also means the tool works the same whether you're calculating a single tip at a restaurant or running several percentage-change checks back to back while reviewing a budget or a set of sales figures.