Percentage Calculator

A percentage calculator is a useful tool that helps you perform various percentage calculations quickly and accurately. Whether you need to calculate discounts, tax rates, or proportional values, this calculator makes it simple.

What Can You Calculate?

1. Basic Percentage Calculations

   • Find what percentage X is of Y
   • Calculate a percentage of a number
   • Find the original number when given a percentage

2. Common Applications

   • Sales tax calculations
   • Discount calculations
   • Percentage increases or decreases
   • Tips at restaurants
   • Grade calculations

How to Use the Calculator

1. Enter your numbers in the appropriate fields
2. Select the type of calculation you want to perform
3. Get instant results

Common Percentage Formulas

• To find what percentage X is of Y: (X ÷ Y) × 100
• To calculate percentage of a number: (Number × Percentage) ÷ 100
• To find the original number: Final Number ÷ (Percentage ÷ 100)

Tips for Working with Percentages

• Remember that 100% equals the whole amount
• To convert a percentage to a decimal, divide by 100
• To convert a decimal to a percentage, multiply by 100
• Percentages can be greater than 100%
• Negative percentages represent decreases

Real-World Examples

1. Shopping Discounts

   • A $50 shirt with a 20% discount
   • Final price = $50 - ($50 × 20%) = $40

2. Tax Calculations

   • Purchase of $100 with 8% sales tax
   • Total = $100 + ($100 × 8%) = $108

3. Academic Grades

   • Scoring 85 points out of 100
   • Grade = (85 ÷ 100) × 100 = 85%