Percentage Calculator
Calculate percentages, find percent changes, and solve percentage equations instantly.
Frequently Asked Questions
What is a percentage?
A percentage is a number expressed as a fraction of 100. It represents a proportion or rate per hundred. For example, 50% means 50 out of 100, or half of something.
How do I calculate what percent one number is of another?
Divide the part by the whole, then multiply by 100. For example, to find what percent 25 is of 200: (25 ÷ 200) × 100 = 12.5%.
What is the difference between percent increase and percent decrease?
Percent increase shows how much a value has grown, while percent decrease shows how much it has shrunk. Both are calculated relative to the original value: ((New - Original) ÷ Original) × 100.
How do I use this calculator for tips and discounts?
For tips: use "What is X% of Y?" mode with the tip percentage and bill total. For discounts: use "% Increase/Decrease" mode with original and sale prices.
Can I calculate percentages for values less than 1?
Yes! This calculator works with any numbers, including decimals and values less than 1. Just enter your values and the percentage will be calculated accurately.