Answer:
50%
Step-by-step explanation:
The markup is the difference between the selling price and the cost price. If the mark up is greater than zero, it means there is a profit, if the markup is less than 0, it means there is a loss and if the markup is equal to 0, it means there is breakeven.
Percentage markup = (markup/cost price) * 100%
Selling price - cost price = markup
15 - cost price = 5
cost price = 10
Percentage markup = (markup/cost price) * 100% = (5/10) * 100% = 50%