Two common percentage calculations in one tool: find X% of a number, or find what percentage one number is of another — useful for discounts, marks and everyday maths.
Use the 'X is what % of Y' section with the difference as X and the original value as Y.
Common types include finding a percentage of a number, percentage increase/decrease, and what percent one number is of another.
Yes, decimal values are fully supported for precise calculations.
Yes, it's commonly used for discount amounts, tax percentages, and marks/grade percentages.