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Enter the price and discount to see the final price and what you save. The third field handles the retail trick that catches everyone: stacked discounts. "20% off plus an extra 10% at checkout" is not 30% off — the second discount applies to the already-reduced price, making it 28% overall. The calculator shows the true combined percentage so you can compare deals honestly.
Frequently asked questions
Why isn't 20% off plus 10% off the same as 30% off?
The second discount applies to the reduced price, not the original. $100 → 20% off → $80 → extra 10% → $72, which is 28% off overall. Stores stack discounts precisely because it sounds bigger than it is.
How do I work out a sale price quickly in my head?
Multiply by what's left: 30% off means paying 70%, so shift the decimal and multiply — $45 at 30% off is 45 × 0.7 = $31.50. For 25% off, knock off a quarter.
Does this handle "fraction off" deals like ⅓ off?
Enter the percentage equivalent — ⅓ off is 33.33%, ¼ off is 25%. Decimals in the discount field are fine.