Answer: The required sale price of the jacket is $140.
Step-by-step explanation: Given that while shopping, we see a jacket marked down 20% and the original price of the jacket is $175.
We are to find the sale price of the jacket.
Since we are getting a discount of 20%, so the sale price will be original price minus the discount price.
The discount price is given by

Therefore, the sale price of the jacket is given by

Thus, the required sale price of the jacket is $140.