📊 Percentage Calculator
All your percentage math in one place. Calculate percentage of marks, percent increase/decrease, and find what percent of a number.
What is X% of Y?
📌 Quick Examples:
Result
0
Enter values to calculate.
Formula: (Percentage ÷ 100) × Value
📖 What is Percentage?
"Per cent" means "per 100". It is a way of expressing a number as a fraction of 100. It is denoted by the symbol "%". Percentages are used to compare quantities, calculate discounts, find exam scores, and analyze data in everyday life.
📐 Formulas Used
Basic Percentage
Value = (Percentage ÷ 100) × Number
Example: 20% of 150 = (20/100) × 150 = 30
Marks Percentage
Percentage = (Obtained ÷ Total) × 100
Example: 85 out of 100 = (85/100) × 100 = 85%
Percentage Change
Change% = ((New - Old) ÷ Old) × 100
Example: 100 to 120 = 20% increase
💡 Common Percentage Applications
Sale Price = Original Price - (Original Price × Discount%)
Tax Amount = Price × (Tax Rate ÷ 100)
Percentage = (Marks Obtained ÷ Total Marks) × 100
Simple Interest = Principal × Rate × Time ÷ 100
📊 Quick Percentage Conversion Table
1/2
50%
1/4
25%
3/4
75%
1/10
10%
1/5
20%
1/8
12.5%
1/3
33.33%
2/3
66.67%
❓ Frequently Asked Questions
How do I calculate percentage of marks?
To calculate marks percentage, divide the marks you obtained by the total marks, then multiply by 100. For example, if you scored 85 out of 100, your percentage is (85/100) × 100 = 85%.
How do I calculate percentage increase?
Percentage increase = ((New Value - Old Value) ÷ Old Value) × 100. If the result is positive, it's an increase; if negative, it's a decrease.
What is 20% of 50?
20% of 50 = (20/100) × 50 = 10. Use our basic percentage calculator above to find any percentage of any number!
How do I calculate discount percentage?
Discount % = (Discount Amount ÷ Original Price) × 100. For example, if a ₹1000 item is sold for ₹800, discount = ₹200, so discount % = (200/1000) × 100 = 20%.
💡 Tip: Percentages are everywhere! From shopping discounts to exam results, understanding percentages helps you make better financial decisions.