Percentages
How do you calculate a discounted price?
Final price after discount and how much you save.
Quick answer
Discounted price = original × (1 − discount% ÷ 100). At €89.90 with 30% off: 89.90 × 0.70 = €62.93. You save €26.97 (30% of 89.90).
Discounted price
$62.93
- You save
- $26.97
How it works
Stacked discounts multiply, they do not add. 20% off then 10% off is 0.80 × 0.90 = 72% of original (28% total off), not 30%. Apply each reduction to the current price.
Frequently asked questions
How do I find the original price?+
Original = sale price ÷ (1 − discount% ÷ 100). €62.93 at 30% off: 62.93 ÷ 0.70 = €89.90.
What discount is half price?+
50% off. BOGO on identical items is effectively 50% per unit if you use both.
Discount before or after tax?+
Usually pre-tax. €100 at 20% off then 22% VAT: €80 + €17.60 = €97.60.
How do I compare two discount offers?+
Convert both to final price including shipping. Percentage alone misleads when starting prices differ.
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