此餐廳九折優惠，再打八折，相當於原價打幾折？

此餐廳九折優惠，再打八折，相當於原價打幾折？

結果 (英文) 1:

This restaurant offers a 10% discount, and then a 20% discount. How much discount is equivalent to the original price?

結果 (英文) 2:

This restaurant offers 10% discount, and another 20% discount. How much discount is equivalent to the original price?

結果 (英文) 3:

This restaurant offers a 10% discount and a 20% discount, which is equivalent to the original price.