How Discounts Are Calculated
Sale Price = Original × (1 − Discount% ÷ 100)
Example: a $80 jacket at 25% off → 80 × 0.75 = $60, saving $20.
Stacked (double) discounts
Final = Original × (1 − D1÷100) × (1 − D2÷100)
An "extra % off" coupon applies to the already reduced price. 20% + extra 10% = 28% total, not 30%: $100 → $80 → $72. The calculator shows the true effective discount so you're never fooled by a sale tag.
Frequently Asked Questions
How do I calculate a discount?
Multiply the original price by the discount percentage and divide by 100 — that's the amount saved. Subtract it from the original price for the sale price. Example: $80 at 25% off saves $20, so you pay $60.
How do stacked (double) discounts work?
The second discount applies to the already-reduced price, not the original. 20% off plus an extra 10% is 28% total, not 30%: $100 → $80 → $72.
Is 50% off the same as buy one get one free?
Only if you actually need two items. BOGO gives 50% off per unit but forces double quantity; a straight 50% discount saves the same per item with no minimum.