Example: If 2,250 is 15% of a number, what is that number? → 2,250 ÷ 0.15 = 15,000
Markup vs Margin: Markup = profit ÷ cost × 100. Margin = profit ÷ selling price × 100. Same profit, different base — they yield different percentages.
Your calculations appear here.
15% of 15,000 = 2,250
Every percentage problem boils down to four core formulas. Here they are — with plain-English explanations and worked examples.
Used for discounts, taxes, tips, and commissions.
E.g., 15% of 15,000 = (15 ÷ 100) × 15,000 = 2,250
Used for salary hikes, price rises, investment growth.
E.g., Increase 1,000 by 20% = 1,000 × 1.20 = 1,200
Used for sale discounts, EMI reduction, depreciation.
E.g., Decrease 5,000 by 12% = 5,000 × 0.88 = 4,400
Used for year-over-year comparisons, exam score changes.
E.g., 80 → 100: ((100 - 80) ÷ |80|) × 100 = +25%
The Percentage Increase Calculator finds the new value after applying a percentage rise. Formula: New Value = Original × (1 + Rate/100). Commonly used for salary hike calculations (₹50,000 + 10% = ₹55,000), GST addition (₹1,000 + 18% = ₹1,180), and investment growth projections. Use the Increase tab above to compute this instantly.
The Percentage Decrease Calculator finds the new value after applying a percentage reduction. Formula: New Value = Original × (1 - Rate/100). Used for calculating sale prices (₹5,000 at 12% off = ₹4,400), depreciation of assets, and budget cuts. Switch to the Decrease tab above to try it.
The Percentage Change Calculator measures how much a value has changed relative to its starting point. Formula: ((Final − Initial) / |Initial|) × 100. A positive result means an increase; negative means a decrease. Perfect for comparing exam scores, revenue figures, population counts, or stock prices over time.
| Question | Formula | Answer |
|---|---|---|
| What is 15% of 15,000? | (15 ÷ 100) × 15,000 | 2,250 |
| Increase 1,000 by 20% | 1,000 × 1.20 | 1,200 |
| Decrease 5,000 by 12% | 5,000 × 0.88 | 4,400 |
| % change: 80 → 100 | ((100−80) ÷ |80|) × 100 | +25% |
| 2,250 is 15% of what? | 2,250 ÷ 0.15 | 15,000 |
| What is 18% GST on ₹2,500? | (18 ÷ 100) × 2,500 | ₹450 |
| 30% off ₹1,200 | 1,200 × 0.70 | ₹840 |
| 10% salary hike on ₹50,000 | 50,000 × 1.10 | ₹55,000 |
| Score: 72 out of 90 | (72 ÷ 90) × 100 | 80% |
| Markup: cost ₹800, sell ₹1,000 | (200 ÷ 800) × 100 | 25% Markup |
Use the Percentage Decrease tab to find the final price after a sale discount. Example: 25% off ₹3,200 = ₹2,400.
→ Try Discount CalculatorAdd 5%, 12%, or 18% GST to any base price using the Basic % tab. Example: 18% GST on ₹10,000 = ₹1,800.
→ Try GST CalculatorUse the Percentage Increase tab to calculate your new salary after an appraisal. Example: ₹40,000 + 15% = ₹46,000.
→ Try Salary CalculatorCalculate your percentage score from marks obtained. Example: 450 out of 600 = (450 ÷ 600) × 100 = 75%.
Use the Margin/Markup tab to determine retail margins and markup percentages for business pricing decisions.
Compare investment growth using the Percentage Change tab. Example: Portfolio grew from ₹1,00,000 to ₹1,25,000 = +25% return.
→ Try SIP CalculatorAll calculations are performed locally in your browser. Results are mathematical estimates for reference purposes only.