Percentage Calculator
Understanding Percentages
A percentage is a number or ratio expressed as a fraction of 100. It calculated as (Part/Whole) × 100.
Common Uses
- Discounts and sales tax
- Tips at restaurants
- Interest rates
- Grade calculations
💡 Tips
- To find X% of Y: multiply Y by X/100
- Percentage increase = ((New - Old) / Old) × 100
- A 50% increase followed by 50% decrease doesn't return to original
- Percentages can exceed 100%