Is this how air ticket discounts are calculated?

The discount is only a fare discount. The fares available in each place are different. If the fare is 1,000 yuan, a 50% discount means multiplying the fare by 0.5. Airport construction fees and oil surcharges are also added in each place. The fares are uniformly stipulated. No matter where you go, the fare is fixed.

The first class ticket is 150% of the ticket price, the business class ticket is 130%, and the economy class ticket is full price (this The fare is fixed). The discount is only for economy class