使用方法
- 在第一個欄位中輸入原始價格。
- Enter the primary discount percentage (0–100)。
- Optionally enter an extra coupon percentage, which is applied sequentially after the first discount。
- Read the final sale price and total savings amount with overall percentage off。
範例
- Original price 50,000 with 20% discount gives a sale price of 40,000, saving 10,000 (20.0%)。
- Original price 120,000 with 30% off then a 10% extra coupon: after first discount 84,000, final price 75,600, saving 44,400 (37.0% total)。