Calculate what percentage one number is of another.
Calculate percentages easily: find what percent one number is of another, calculate percentage increase or decrease, and find the percentage of a number. This free percent calculator handles all common percentage problems in seconds.
Select from three calculation modes: What is X% of Y, X is what percent of Y, or Percentage Change between two values. Each mode handles a different percentage problem.
Input the numbers for your calculation. For percentage change, enter the original value and the new value to see the increase or decrease.
Click Calculate to see the answer instantly. The result shows the computed percentage, calculated value, or percentage difference.
You can switch between modes at any time without losing your input. Each mode maintains its own inputs for convenience.
Q: How do I calculate what X% of Y is?
A: Use the 'What is X% of Y?' mode. Enter the percentage as X and the number as Y. The calculator multiplies X by Y and divides by 100.
Q: How is percentage change calculated?
A: Percentage change = ((New Value - Original Value) / Original Value) × 100. A positive result means an increase, a negative result means a decrease.
Q: Can I calculate percentage of a percentage?
A: Yes. Simply enter the first percentage as X and the second percentage as Y. For example, 50% of 20% = 10%.