A $15 item is 10% off. What is the sale price?
The sale price is $13.5. You save $1.5.
How to work it out
- 1
The original price is $15 and the discount is 10%.
- 2
Method 1: find the discount, then subtract it.
- 3
Method 2: you pay 90% of the price, so multiply by 0.9:
- 4
Answer: the sale price is $13.5 and you save $1.5.
LaTeX source of the formulas on this page
\[ 15 \times 0.9 = 13.5 \]
\[ 10\% \text{ of } 15 = 0.1 \times 15 = 1.5\qquad 15 - 1.5 = 13.5 \]$15 at other discounts
| Discount | Sale price |
|---|---|
| 5% off | $14.25 |
| 15% off | $12.75 |
| 20% off | $12 |
| 25% off | $11.25 |
| 30% off | $10.5 |
| 40% off | $9 |
| 50% off | $7.5 |
Questions
What is 10% off $15?
The sale price is $13.5. You save $1.5.
How do I find the sale price quickly?
Multiply the price by 0.9 (that is 100% − 10%).