Frequently Asked Questions
How do I calculate a percentage discount?
Multiply the original price by (discount% / 100) to find the discount amount, then subtract from the original price. Or multiply by (1 - discount%/100) directly. For 25% off $80: $80 × 0.75 = $60.
How do I calculate a double discount?
Apply each discount sequentially. For 20% off then 10% off on $100: first discount gives $80, second discount gives $80 × 0.90 = $72. Note: 20% + 10% off is NOT 30% off.
Should I calculate discount before or after tax?
Discounts are typically applied before tax. The sales tax is then calculated on the discounted price, resulting in a lower total than if tax were applied first.
How do I find the original price from a sale price?
Divide the sale price by (1 - discount%/100). If an item is $60 after 25% off: $60 ÷ 0.75 = $80 original price.
What is the difference between discount and markdown?
A discount is a temporary price reduction (sale), while a markdown is a permanent price reduction. Both are calculated the same way, but markdowns indicate the new regular price.