What is 10% of 20?
10% of 20 =
2
Step-by-step workings
Why this works
To find 10% of 20, we first convert the percentage to a decimal. 10% means 10 out of every 100, so we divide 10 by 100 to get 0.1. We then multiply this decimal by 20 to find our answer of 2.
This works because a percentage is simply a fraction of 100. 10% is the same as the fraction 1/10 (one tenth). Multiplying any number by 0.1 gives you exactly 10 parts out of every 100 of that number.
Result = (10 ÷ 100) × 20
Result = 0.1 × 20 = 2
How to check your answer
To verify that 2 is 10% of 20, divide the answer by 20 and multiply by 100:
(2 ÷ 20) × 100 = 10%
This confirms the answer is correct. Dividing the part by the whole and multiplying by 100 is the standard way to find what percentage one number is of another.
How to calculate 10% of 20 without a calculator
10% of any number is found instantly by dividing by 10.
Dividing by 10 shifts the decimal point one place to the left.
10% in context
10% is less than half. It means 10 parts out of every 100. As a fraction it is 1/10 (one tenth). As a decimal it is 0.1.
| Form | Value |
|---|---|
| Percentage | 10% |
| Decimal | 0.1 |
| Fraction | 1/10 |
| 10% of 20 | 2 |
Real world examples
10% off a £20 item
A retailer offers 10% off a product priced at £20. The saving is £2, so the sale price is £18.
Saving 10% of a £20 budget
If you put aside 10% of a £20 monthly budget, you save £2 each month. Over a year that adds up to £24.
10% service charge on a £20 bill
A restaurant adds a 10% service charge to a £20 bill. The charge is £2, bringing the total to £22.
More calculations using 10%
Related calculations
Related calculators and guides
- Use our percentage of a number calculator to calculate any percentage of any number instantly.
- To find what percentage of your income 20 represents, try the percent of income calculator.
- Want to understand how percentages work? Learn how to calculate percentages for GCSE with worked examples and revision notes.