Answer:
80%
Explanation:
The product that is being sold, is being sold for a specific price. This price would be 100% of the money being received from selling the product. Since the store is taking a 20% fee for selling the product on behalf of Kim. Then that means that 20% is being subtracted from the total value of the product (100%) like so...
100% - 20% = p
80% = p
Therefore, that would leave Kim with 80% of the selling price as profit for herself.