A website is selling gift bags for $0.78. The site got the gift bags at a cost of $0.26. What percentage is the mark-up?

Write your answer using a percent sign (%).

The mark-up is equal to the selling price minus the cost price.

Mark-up = Selling price - Cost price
Mark-up = $0.78 - $0.26
Mark-up = $0.52

To find the mark-up percentage, we divide the mark-up by the cost price and multiply by 100.

Mark-up percentage = (Mark-up / Cost price) * 100
Mark-up percentage = ($0.52 / $0.26) * 100
Mark-up percentage = 200%

Therefore, the mark-up percentage is 200%.