Percent Off Calculator

Convert the percent to a decimal and multiply the price by the remaining fraction: 25% off $80 is $80 × (1 − 0.25) = $60. Savings are simply the original price minus that result — $20 here. For 10% off, move the decimal one place and subtract it ($80 → $8 off → $72).

Each discount applies to the price after the previous one. 25% off $80 gives $60; an extra 20% off takes 20% of $60 ($12), landing at $48. The effective discount is 1 − 0.75 × 0.80 = 40%, not 45%, because the second discount hits a smaller base. Stacking is commutative — the order gives the same result.

After the discount. Stores charge tax on the actual amount you pay. A $80 item at 25% off with 8% tax is taxed on $60: $60 × 1.08 = $64.80. Manufacturer coupons can be treated differently in some states (treated as payment, so tax applies pre-coupon), but store and promotional discounts almost always reduce the taxable price.

They tie at exactly those numbers: 0.75 × 0.80 = 0.60 keep-rate, an effective 40% off either way. But in general a flat X% off beats stacking two discounts that sum to X: 30% + 20% stacks to 1 − 0.70 × 0.80 = 44% effective, versus a flat 50%. When you see "take an extra % off," calculate the effective rate before assuming it stacks additively.

Divide the sale price by the keep-rate. If you paid $60 after a 25% discount, the original was $60 ÷ 0.75 = $80. For stacked discounts, divide by the product of keep-rates: $48 ÷ (0.75 × 0.80) = $80. This is handy for checking whether a "was/now" deal is genuine.