Percentage Add/Subtract Calculator
Add or subtract a percentage from a number. Perfect for calculating price markups, discounts, and percentage adjustments in business and finance.
Add or Subtract Percentage
Enter a base value and percentage to add or subtract:
Subtract: Result = Base - (Percentage × Base)
Percentage Calculations Explained
Adding or subtracting a percentage from a number is a common calculation used in business, finance, and everyday life. Whether you're calculating price markups, discounts, or adjustments, this calculator makes it easy.
Common Applications
💰 Price Markups
Calculate selling prices with profit margins
🏷️ Discounts
Determine sale prices and markdowns
📊 Tax Calculations
Add or subtract tax amounts
📈 Salary Adjustments
Calculate raises or pay cuts
How Percentage Calculations Work
| Operation | Formula | Example | Result |
|---|---|---|---|
| Add 20% | 100 + (20% × 100) | $100 + (20% × $100) | $120 |
| Subtract 15% | 100 - (15% × 100) | $100 - (15% × $100) | $85 |
| Add 50% | 200 + (50% × 200) | $200 + (50% × $200) | $300 |
| Subtract 30% | 500 - (30% × 500) | $500 - (30% × $500) | $350 |
Real-World Examples
🏪 Retail Pricing
Cost: $50, Markup: 40%
Price: $50 + (40% × $50) = $70
🛒 Sale Discount
Original: $200, Discount: 25%
Sale: $200 - (25% × $200) = $150
💼 Commission
Sales: $1000, Commission: 8%
Earned: $1000 × 8% = $80
📈 Investment Growth
Initial: $5000, Growth: 12%
Final: $5000 + (12% × $5000) = $5600
💡 Pro Tip: To calculate what percentage to add to reach a target amount, use: Percentage = ((Target - Original) ÷ Original) × 100
Business Applications
| Scenario | Calculation Type | Typical Percentage |
|---|---|---|
| Retail Markup | Add | 30-100% |
| Wholesale Discount | Subtract | 10-30% |
| Sales Tax | Add | 5-15% |
| Employee Raise | Add | 2-10% |
| Bank Interest | Add | 0.5-5% |
| Inflation Adjustment | Add | 2-4% |
Percentage vs Absolute Values
Understanding when to use percentages vs fixed amounts:
- Percentages: Scale with the base value (fair for different sizes)
- Fixed Amounts: Same amount regardless of base value
- Large Values: Percentages often preferred for scalability
- Small Values: Fixed amounts may be more practical
Common Percentage Calculations
🧾 Sales Tax
Add 8.25% for Texas sales tax
🍽️ Restaurant Tip
Add 15-20% for service
🏢 Rent Increase
Add 3-5% annual adjustment
💼 Commission
Add 5-10% sales commission
Percentage Calculation Methods
Different ways to calculate percentage adjustments:
| Method | Formula | Advantage |
|---|---|---|
| Mental Math | Move decimal: 15% = 0.15 | Quick estimation |
| Proportion | Amount × (Percent ÷ 100) | Clear understanding |
| Calculator | Direct percentage calculation | Most accurate |
| Multiplication | Amount × Percent × 0.01 | Efficient for large numbers |