How do you calculate a 43 percent mark up on a retail Price?

To calculate a 43 percent markup on a retail price, first determine the retail price you want to apply the markup to. Multiply the retail price by 0.43 to find the amount of the markup. Then, add this markup amount to the original retail price to get the final price after the markup. For example, if the retail price is $100, the markup would be $43, resulting in a final price of $143.