A $100 item is 10% off. What is the sale price?
The sale price is $90. You save $10.
How to work it out
- 1
The original price is $100 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 $90 and you save $10.
LaTeX source of the formulas on this page
\[ 100 \times 0.9 = 90 \]
\[ 10\% \text{ of } 100 = 0.1 \times 100 = 10\qquad 100 - 10 = 90 \]$100 at other discounts
| Discount | Sale price |
|---|---|
| 5% off | $95 |
| 15% off | $85 |
| 20% off | $80 |
| 25% off | $75 |
| 30% off | $70 |
| 40% off | $60 |
| 50% off | $50 |
Questions
What is 10% off $100?
The sale price is $90. You save $10.
How do I find the sale price quickly?
Multiply the price by 0.9 (that is 100% − 10%).