Percentage Calculator
Calculate percentages, percentage change, and percentage increase/decrease with detailed step-by-step explanations.
Percentage Calculator
Calculate percentages with AI-powered explanations
What is X% of Y?
Find what percentage of a number equals another number
💡 Example: What is 25% of 200? Answer: 50
Percentage Formulas
How to Use
• Choose your calculation type from the four available tabs
• Enter values in the labeled input fields with clear examples
• Click Calculate to see instant results with smooth animations
• View AI explanations with step-by-step breakdowns
• Copy or save results for later reference and sharing
• Switch between types easily for different percentage calculations
Percentage Calculation Methods
Percentages are used everywhere in daily life - from calculating discounts and tips to analyzing data and academic grades. Our calculator handles four common percentage calculations.
Types of Calculations:
1. What is X% of Y?
Formula: (X / 100) × Y
Example: What is 25% of 200? = (25/100) × 200 = 50
2. X is what percent of Y?
Formula: (X / Y) × 100
Example: 50 is what percent of 200? = (50/200) × 100 = 25%
3. Percentage Change
Formula: ((New - Old) / Old) × 100
Example: Change from 100 to 150 = ((150-100)/100) × 100 = 50%
4. X plus/minus Y%
Formula: X ± (Y/100) × X
Example: 100 + 25% = 100 + (25/100) × 100 = 125
Common Percentage Applications
Academic Grades
Calculate test scores, assignment percentages, and grade improvements. Example: If you got 85 out of 100, that's 85%.
Shopping & Discounts
Calculate sale prices, discounts, and savings. Example: A $50 item with 20% off costs $40 (50 - 20% of 50).
Financial Analysis
Track investment returns, interest rates, and financial growth over time.
Statistics & Data
Express proportions, survey results, and data comparisons as percentages.