20) In a certain store, the profit is 320% of the cost. If the cost increases by 25% but the selling price remains constant, approximately what percentage of the selling price is the profit?

Step 1: Let's assume the cost price of the item is $100. According to the problem, the profit is 320$100, which is $320.

Step 2: The selling price of the item would be the cost price plus the profit, which is $100 +$320 = $420.

Step 3: If the cost increases by 25%, the new cost price would be $100 + 25$100 = $125.

Step 4: However, the selling price remains constant at $420. So, the new profit would be the selling price minus the new cost price, which is$420 - $125 =$295.

Step 5: To find out what percentage of the selling price is the new profit, we divide the new profit by the selling price and multiply by 100. So, the new profit percentage would be ($295 /$420) * 100 = approximately 70.24%.

So, if the cost increases by 25% but the selling price remains constant, approximately 70.24% of the selling price is the profit.