Stacked discounts are not added together
“25% off, plus an extra 10%” is not 35% off. The extra 10% comes off the already reduced price: 100 → 75 → 67.50, a total of 32.5% off. The calculator shows the real total discount.
Sale price and savings from a percentage or fixed discount, including a second discount.
“25% off, plus an extra 10%” is not 35% off. The extra 10% comes off the already reduced price: 100 → 75 → 67.50, a total of 32.5% off. The calculator shows the real total discount.