Percentage Calculator
Three modes: find a percentage, find what percent X is of Y, and calculate percentage change.
Deep Dive
A versatile percentage calculator covering the most common percentage operations: percentage of a number, percentage change between two values, and finding what percentage one number is of another. Results are instant and displayed with working steps for clarity.
Who uses this?
- Calculating a percentage discount on a purchase
- Finding the percentage increase in monthly sales
- Computing the percentage of marks scored in an exam
- Splitting a tip as a percentage of a restaurant bill
Common Errors & Fixes
Result is multiplied by 100 when it shouldn't be
Ensure you're using the correct tab. 'Percentage of' gives the raw number; 'What percent is X of Y' gives the percentage figure.
Expert FAQ
How do I calculate a percentage increase?
Use the 'Percentage Change' tab. Enter the original value and the new value. The tool calculates ((new - original) / original) × 100.
What is 'X is what % of Y'?
This answers questions like 'What percentage of 200 is 50?' The answer is (50 / 200) × 100 = 25%.
How do I find Y% of X?
Use the 'Percentage Of' tab. Enter X as the base and Y as the percentage. The result is (Y / 100) × X.