Final answer:
Gus marked up the sunglasses by 30% before selling them. The calculation involves finding the difference between the selling price and the purchase price, then dividing by the original purchase price and multiplying by 100.
Step-by-step explanation:
To calculate the markup percentage that Gus applied to the sunglasses, we must first determine the actual markup in dollars and then divide that amount by the original purchase price. Following that, we multiply the result by 100 to convert it into a percentage.
- Find the markup: Subtract the original purchase price from the selling price.
Markup = Selling Price - Purchase Price
Markup = $58.50 - $45.00
Markup = $13.50 - Calculate the markup percentage: Divide the markup by the original purchase price and then multiply by 100.
Markup Percentage = (Markup / Purchase Price) × 100
Markup Percentage = ($13.50 / $45.00) × 100
Markup Percentage = 0.3 × 100
Markup Percentage = 30%
Therefore, Gus marked up the price of the sunglasses by 30% before selling them to his friend.