Percentage Calculator
Four everyday percentage calculations in one place: a percent of a number, what percent one number is of another, percentage change, and increase or decrease by a percent.
النسخة العربية ↗How to use it
- Find the line that matches your question.
- Type your numbers into the boxes. The answer appears on the right straight away.
- All four lines work at the same time, so you can check several things without clearing anything.
The four formulas
1. What is X% of Y?
Example: a 15% tip on a 200 bill is 15 ÷ 100 × 200 = 30.
2. X is what percent of Y?
Example: you scored 42 out of 50 in a test. 42 ÷ 50 × 100 = 84%.
3. Percentage change from X to Y
Example: your rent goes from 4,000 to 4,400. (4,400 − 4,000) ÷ 4,000 × 100 = +10%. A negative result means a decrease.
4. Increase or decrease Y by X%
decreased = Y × (1 − X ÷ 100)
Example: a 250 item with 5% VAT costs 250 × 1.05 = 262.50. With a 20% discount it costs 250 × 0.80 = 200.
Quick VAT reference for the Gulf
| Country | Standard VAT | Multiply price by |
|---|---|---|
| Saudi Arabia | 15% | 1.15 |
| UAE | 5% | 1.05 |
| Bahrain | 10% | 1.10 |
| Oman | 5% | 1.05 |
Rates can change, so check the latest figure with your tax authority for invoices and accounting.
Frequently asked questions
How do I calculate a percentage of a number?
Divide the percentage by 100 and multiply by the number. 25% of 80 is 0.25 × 80 = 20.
How do I calculate percentage increase?
Subtract the old value from the new value, divide by the old value and multiply by 100.
How do I remove VAT from a price?
Divide the price by 1 plus the VAT rate. In Saudi Arabia, a price of 115 including 15% VAT is 115 ÷ 1.15 = 100 before VAT.
What is the difference between percent and percentage points?
If a rate moves from 10% to 12%, it rose by 2 percentage points, which is a 20% increase in the rate itself.
Can I calculate a discount?
Yes. Use the last line: enter the price and the discount percent and read the “after decrease” value.
