35% discount.
To calculate the price after the 35% discount is applied, you would multiply $275.00 by 0.35, which would give you $96.25. Then you would subtract that amount from $275.00, so the final price would be $178.75.
To calculate the price after the 25% and 10% discounts are applied, you would first multiply $275.00 by 0.25, which would give you $68.75. Then you would subtract that amount from $275.00, leaving you with $206.25. Next, you would multiply $206.25 by 0.10, which would give you $20.625. You would then subtract that amount from $206.25, so the final price would be $185.625
In this case, the 35% discount would save the customer $96.25 and the series of discounts would save the customer $89.375. So the better deal is the 35% discount