The Percentage Calculator is an app that helps you accurately and easily perform various percentage calculations commonly needed in daily life and business.

Key Features:

1. Percentage of Total
- Instantly calculate what percentage of a total is
- Perfect for shopping discounts and sale price calculations
- Example: What is 20% of $50?

2. Percentage Ratio
- Calculate what percentage one value is of another
- Useful for test scores and performance analysis
- Example: What percentage is 75 points out of 100?

3. Percentage Change
- Measure the percentage change between two values
- Excellent for checking stock or real estate price fluctuations
- Example: What's the percentage change from $1,000 to $1,200?

4. Percentage Increase/Decrease
- Calculate a value after increasing or decreasing by a specific percentage
- Convenient for tip calculations, tax additions, or discount applications
- Example: What is $80 plus 10% tax? Or what is the price after a 30% discount?

Features:

- Clean and intuitive user interface
- Real-time calculations for immediate results
- Automatic updates when input values change
- Responsive design optimized for all devices
- Fast execution speed

Use this single app whenever you need percentage calculations in shopping, academics, finance, business, and more! Get accurate percentage calculations easily without complex calculator usage or formulas.