What is 15% of 240?
The answer is 36.
Result Explanation
15% of 240 is 36. That 36 is the “percentage portion” taken from 240, which is why it’s handy for discounts, fees, tips, and budgeting.
If you’re taking 15% off, you subtract 36 (240 − 36 = 204). If you’re adding 15%, you add 36 (240 + 36 = 276). For related calculations, use the discount calculator for final prices and the reverse percentage calculator when you know the result and need the original value.
How It Works
Step 1: Convert 15% into a decimal by dividing by 100. That gives 0.15.
Step 2: Multiply the decimal by the number: 0.15 × 240 = 36.
Full formula: (15 ÷ 100) × 240 = 36
This same method works for any percentage-of-number calculation, whether you are finding 5%, 12%, 18%, 25%, 40%, or any other rate.
Strategy / Insight
The easiest way to estimate 15% mentally is to split it into 10% + 5%. For 240, 10% is 24 and 5% is 12. Add them together and you get 36. This shortcut is especially useful when you need a fast estimate without reaching for a calculator.
In real life, 15% comes up often enough that learning this shortcut pays off. It can help you sense-check restaurant tips, promotional discounts, fee percentages, or how much of a budget should be reserved for a particular category.
Common Mistakes
- Using 15 instead of 0.15 when multiplying.
- Forgetting that “percent” means “per hundred”.
- Subtracting the percentage amount from the total before answering the actual question.
- Rounding too early, especially on money calculations.
- Mixing up “15% of 240” with “increase 240 by 15%” or “240 is what percent of another number”.
Pro Tip
Whenever you see 15%, think “ten percent plus five percent.” It is one of the fastest and most reliable percentage shortcuts, and it works well for prices, fees, savings targets, and everyday estimates.
Examples
Example 1: Discount
If an item costs £240 and the discount is 15%, the saving is £36. The discounted price would be £204.
Example 2: Budgeting
If you set aside 15% of 240 for tax, savings, marketing, or overheads, the amount allocated would be 36.
Example 3: Fee or reserve amount
If a £240 payment has a 15% fee, contribution, or reserve attached, the percentage portion would be £36.
Related Links
FAQ
What is 15% of 240?
15% of 240 is 36.
How do you work out 15% of 240?
Convert 15% to 0.15 and multiply it by 240. The answer is 36.
What is the fastest mental method for 15% of 240?
Find 10% of 240 first, which is 24, then add 5%, which is 12. That gives 36.