



 
Hi Itzie, I am not sure of your numbers either but let me try to explain. A shopkeeper has a cost of $15.00 for an item and a selling price of $25.00 so the markup is $25.00  $15.00 = $10.00. Now you want to express this markup as a percentage and the crucial question is, A percentage of what?
In what you sent I am not sure what the $15.00 and $25.00 are but I hope my explanation helps.  


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