On New Year's day, all the goods in the store are reduced by 5% 1. A dress is just reduced by 100 yuan. How much is the original price of this dress? How much is the current price?

On New Year's day, all the goods in the store are reduced by 5% 1. A dress is just reduced by 100 yuan. How much is the original price of this dress? How much is the current price?

The original price is 100 | 1 | 5 = 500 (yuan) and the current price is 500-100 = 400 (yuan)