What is 25% of 20?
25% of 20 is 5. Use the calculator below to change either number, or see related calculations.
Calculating 25% of 20: divide 25 by 100, then multiply by 20. The general formula is (X ÷ 100) × Y — works for any percentage and any number.
Round percentages like this are easy to estimate mentally and common in UK retail and tax. This base value sits in the everyday range — receipts, tips, small purchases.
How it works.
Formula: (X ÷ 100) × Y.
Step by step:
- Divide the percentage by 100: 25 ÷ 100 = 0.25.
- Multiply by the number: 0.25 × 20 = 5.
Worked examples
25% of 20 = 5 — the basic calculation: divide 25 by 100 (= 0.25), then multiply by 20.
25% of 20 as a tip on a small bill — if a service charge of 25% is added to a 20 item, the extra is 5.
25% off a 20-pound item — the discount saves 5; the sale price is £15.
Frequently asked questions
How do I calculate 25% of 20?
Divide 25 by 100, then multiply by 20. 25 ÷ 100 = 0.25; 0.25 × 20 = 5. The same formula works for any pair of numbers.
What is 25 percent of 20?
5. The full calculation: (25 ÷ 100) × 20 = 0.25 × 20 = 5.
Are there mental-maths shortcuts for percentages?
Yes. 10% of any number is the number with the decimal moved one place left. From there: 20% is double 10%; 5% is half of 10%; 15% is 10% plus half of 10%; 25% is a quarter; 50% is half. For UK shopping discounts, the 10%-anchor trick covers most quick estimates without a calculator.