Calculate the final price after a discount, how much you save, and what percentage off a price is. Three modes: price after discount, percentage off, and original price finder.
Multiply the original price by the discount percentage, then subtract from the original. Formula: Sale Price = Original Price × (1 - Discount%). For example: $100 at 20% off = $100 × 0.80 = $80.
20% off $100 = $80. You save $20. Calculation: $100 × 0.20 = $20 discount, $100 - $20 = $80 final price.
Divide the sale price by (1 - discount%). For example, if an item costs $80 after a 20% discount: $80 / 0.80 = $100 original price.
30% off $200 = $140. You save $60. Calculation: $200 × 0.30 = $60 discount, $200 - $60 = $140.
25% off $50 = $37.50. You save $12.50.
Subtract the sale price from the original price to get the saving, then divide by the original price and multiply by 100. Formula: Percentage Off = (Original - Sale) / Original × 100.
50% off means half price. Take any price and divide by 2. $200 at 50% off = $100.
15% off $80 = $68. You save $12. Calculation: $80 × 0.15 = $12, $80 - $12 = $68.