The Percentage Calculator is a versatile tool for solving various percentage-based problems such as percent increase, percent decrease, finding percentage of a number, or reverse calculations. It's widely used in education, finance, shopping, and taxes.
How to Use the Percentage Calculator
Select the type of percentage calculation:
- What is X% of Y?
- X is what percent of Y?
- Percentage increase or decrease between two values
Enter your values, and the calculator will show the result instantly.
Formulas Used
- X% of Y = (X ÷ 100) × Y
- X is what % of Y = (X ÷ Y) × 100
- % Change = ((New - Old) ÷ Old) × 100
Example
What is 20% of 150?
→ (20 ÷ 100) × 150 = 30
200 is what percent of 800?
→ (200 ÷ 800) × 100 = 25%
Old price: $100 → New price: $120
→ % Increase = ((120 - 100) ÷ 100) × 100 = 20%
Common Use Cases
- Calculating discounts and sale prices
- Finding tax, tips, or interest
- Percentage growth in business or finance
- Exam marks and grading
- Data analysis in spreadsheets
Why Use a Percentage Calculator?
Percentage problems are common in daily life and professional settings. This tool saves time, eliminates errors, and makes math easy whether you're at school, shopping, or managing a business.
Frequently Asked Questions (FAQs)
What is a percentage?
A percentage is a number or ratio expressed as a fraction of 100, indicated by the symbol %.
How is percentage increase calculated?
By using the formula: ((new - old) ÷ old) × 100
Can I use this for discounts?
Yes, just enter the discount percent and original price to get the final price.
Is it accurate for taxes?
Yes, but always double-check with exact tax rates or official tools for legal accuracy.
Does it support decimals?
Yes, the tool supports both whole numbers and decimals for precision.
Related tools:
Discount Calculator,
Gst Calculator,
Profit Calculator.
