Question

1. if someone says that a jacket is 25% off, what does that mean?

Explanation:

"25% off" means the price of the jacket is reduced by 25% of its original price. So the customer pays 75% (100% - 25%) of the original price.

Answer:

It means the price of the jacket is reduced by 25% of its original - price, and the customer pays 75% of the original price.