Sale price math
Sale price = original × (1 − discount%). Amount saved = original − sale. Original = sale ÷ (1 − discount%). A $80 item at 25% off is $60. You save $20.
Common questions
Do stacked discounts add?
Usually no. 20% then 10% is 0.8 × 0.9 = 28% off, not 30%.
Is tax included?
This page is pre-tax. Add GST/HST on the tax calculator.