What is a Percentage?
A percentage is a number or ratio expressed as a fraction of 100. It is often denoted using the percent sign, "%". Percentages are a way to express how large or small one quantity is relative to another quantity.
Everyday Examples
- Discounts: A 20% discount on a $50 item saves you $10.
- Tips: A 15% tip on a $30 meal is $4.50.
- Interest Rates: A 5% annual interest rate on a $1000 loan means you'll pay $50 in interest over a year.
Common Formulas
- Percentage of a Number: (Percentage / 100) * Number
- Percentage Change: ((New Value - Old Value) / Old Value) * 100
- What Percentage: (Part / Whole) * 100