Discount Calculator

To calculate the final price after a discount, multiply the original price by (1 minus the discount percentage as a decimal). Formula: Final Price = Original Price × (1 - Discount%). For example, a $100 item with 25% off: $100 × (1 - 0.25) = $100 × 0.75 = $75. Alternatively, calculate the discount amount ($100 × 0.25 = $25) and subtract from the original price ($100 - $25 = $75).

No, stacked discounts don't add up directly. When you apply 20% off then 10% off, the second discount applies to the already-reduced price. For a $100 item: First 20% off gives $80, then 10% off $80 gives $72. That's equivalent to 28% total discount, not 30%. The order doesn't matter mathematically—20% then 10% equals 10% then 20%—but the combined discount is always less than the sum.

To find the original price, divide the sale price by (1 minus the discount percentage as a decimal). Formula: Original = Sale Price ÷ (1 - Discount%). For example, if something costs $60 after a 25% discount: $60 ÷ (1 - 0.25) = $60 ÷ 0.75 = $80 original price. This is useful when stores show only the sale price.

It depends on the price. For expensive items, percentage discounts usually save more money. For cheaper items, flat discounts may be better. Compare by calculating the actual savings: a $20 flat discount saves $20 regardless of price, while 20% off a $150 item saves $30, but 20% off a $50 item saves only $10. Always do the math for the specific item.

To find the discount percentage, subtract the sale price from the original price, divide by the original price, and multiply by 100. Formula: Discount% = ((Original - Sale) ÷ Original) × 100. For example, if an item dropped from $80 to $60: (($80 - $60) ÷ $80) × 100 = ($20 ÷ $80) × 100 = 25% discount.