A percentage discount tells you how much comes off the original price. Turning “30% off” into an actual price — and the amount you save — takes a quick multiplication this tool handles for you.
Reading a sale
The saving is the original price times the discount percentage; the final price is what's left. Watch for stacked discounts: an extra 10% off an already-30%-off price is not 40% off — the second cut applies to the reduced price, so the effective discount is a bit less.
A worked example
An $80 item at 25% off saves you $20, for a final price of $60. At 40% off you'd save $32 and pay $48. The saving grows in step with the percentage, so doubling the discount roughly doubles what stays in your pocket — right up to 100% off, where the item is free.
The stacked-discount trap
“30% off, then an extra 20%” is not 50% off. The second discount applies to the already-reduced price: 30% off $100 is $70, and 20% off that is $56 — an effective 44% discount, not 50%. Retailers lean on stacking because it sounds bigger than it is.
To find the true combined discount, apply the cuts one after another rather than adding the percentages. The same logic explains why a “buy one, get one 50% off” deal is really 25% off across the two items, not 50%.