Description:
Our free Percentage Calculator helps you solve all percentage-related calculations instantly. Calculate percentage of a number, percentage increase/decrease, percentage change between two values, and more. Perfect for calculating discounts, tips, tax, interest rates, growth rates, and other everyday math problems. Mobile-friendly design works on all devices with no installation required.

Popular Search Keywords:
“percentage calculator”, “online percentage tool”, “calculate percentage of a number”, “percentage increase calculator”, “percentage decrease calculator”, “how to calculate percentage”, “discount calculator”, “tip calculator”, “math percentage tool”, “free online calculator”

Key Features:
✔️ Four calculation modes in one tool
✔️ Instant results with no page refresh
✔️ Clear formula explanations for each calculation
✔️ Mobile-friendly responsive design
✔️ Free to use with no registration

Calculation Formulas:

1. Percentage of a Number
   What is X% of Y?

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   Result = (X / 100) × Y

2. Percentage Change
   What is the percentage change from X to Y?

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   Percentage Change = ((Y - X) / X) × 100

3. Percentage Increase
   Increase X by Y%

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   Result = X × (1 + (Y / 100))

4. Percentage Decrease
   Decrease X by Y%

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   Result = X × (1 - (Y / 100))

Examples of Common Uses:

• Calculate 20% discount on a $50 item

• Determine 15% tip on a restaurant bill

• Find percentage increase in your salary

• Compute grade percentage from test scores

• Measure investment growth rate

Bookmark this handy math calculator for quick percentage calculations anytime! Our tool provides accurate results with detailed explanations to help you understand the math behind the calculations.