Percentages are used everywhere, from calculating discounts and tax to understanding statistics, grades, and financial changes, yet percentage math can trip people up, especially percentage increase versus percentage of a number. This percentage calculator handles multiple common scenarios: finding what percentage one number is of another, calculating a percentage of a value, and computing percentage increase or decrease between two numbers. It's a versatile everyday tool for students checking homework, shoppers calculating discounts, or professionals analyzing data trends. Simply select the type of calculation you need and enter your numbers for an instant, accurate result.