Percentage & Discount
Three types of percentage calculations in one tool: find X% of a number (e.g. 20% of 500), find what percentage one number is of another, and calculate percentage increase or decrease. Useful for discounts, VAT, statistics and financial comparisons.
| Calculation type | Formula | Example |
|---|---|---|
| X% of a number | Number × percentage ÷ 100 | 20% of 500 = 100 |
| X is what % of Y? | (X ÷ Y) × 100 | 30 of 150 = 20% |
| % Change | ((New − Old) ÷ Old) × 100 | from 100 to 130 = +30% |
VAT Oman/UAE
One tenth
VAT Saudi Arabia
One fifth
One quarter
Half
How do I calculate 20% of 500?
Multiply the number by the percentage then divide by 100: 500 × 20 ÷ 100 = 100. Or simply 500 × 0.20 = 100. Use the first tab in the calculator above for instant results.
How do I calculate percentage price increase?
% Change = ((New price − Old price) ÷ Old price) × 100. Example: 100 to 130 = 30% increase. Use the "% change" tab in the calculator.
What percentage is 30 of 150?
Divide the first number by the second then multiply by 100: 30 ÷ 150 × 100 = 20%. Use the "What percentage?" tab.
How do I calculate a price after a 30% discount?
Multiply the original price by (1 − discount rate). Example: 200 with 30% discount = 200 × 0.70 = 140.
How do I calculate 5% VAT on a price?
Multiply the price by 0.05 to get the tax amount. Example: 100 × 0.05 = 5 tax, total = 105. Oman and UAE: VAT 5%. Saudi Arabia: VAT 15%.
What is the difference between percentage and percentage point?
A percentage point (pp) is the absolute difference between two percentages. Rising from 10% to 15% is +5 percentage points, but a 50% increase.
How do I calculate profit or loss percentage?
% Profit/Loss = ((Sell price − Buy price) ÷ Buy price) × 100. Example: bought at 200, sold at 250 = 25% profit.
How do I calculate 15% of my monthly salary?
Multiply the salary by 0.15. Example: salary 1000 × 0.15 = 150.
Percentage Calculator — How It Works
This free percentage calculator handles three of the most common percentage problems in one tool — no signup, no ads interrupting results, and everything runs instantly in your browser.
What percentage of a number (X% of Y)
Use this mode to find a percentage of any number. Formula: result = number × percentage ÷ 100. Example: 15% of 80 = 12.
What percentage is X of Y
Answers questions like "30 is what percent of 200?" Formula: (X ÷ Y) × 100.
Percentage increase or decrease
Formula: ((new − old) ÷ old) × 100. Positive = increase, negative = decrease.
Common percentage shortcuts
- 10% of any number: move the decimal one place left (10% of 350 = 35)
- 5% = half of 10% (5% of 350 = 17.5)
- 25% = divide by 4 (25% of 200 = 50)
- 50% = divide by 2 (50% of 90 = 45)