Percentage Calculator

Percentages are woven through everyday life — sales discounts, restaurant tips, exam scores, interest rates, tax, and statistics all rely on them. Yet the mental arithmetic trips people up, particularly when the question is phrased differently from the calculation they remember. "What is 15% of 240?" is straightforward, but "35 is what percent of 80?" or "what was the original price before a 20% discount?" require rearranging the formula, and that is where mistakes creep in.

This calculator handles the full range of percentage questions in one place. It finds a percentage of a number, works out what percent one number is of another, calculates percentage increase and decrease between two values, and adds or removes a percentage from a figure. Each mode uses the correct formula automatically, so you get the right answer without having to remember which operation applies.

Understanding percentage change is especially useful for tracking anything that grows or shrinks over time — a salary rise, an investment return, a price hike, or a drop in expenses. Being able to express those movements as a clear percentage makes them easy to compare and communicate, whether you are budgeting at home or presenting figures at work.