What is the the percentage of profit for the product "858"?
percentage of profit = DIVIDE(SUBTRACT(ListPrice, StandardCost), (StandardCost)) as percentage;
SELECT (T1.ListPrice - T2.StandardCost) * 100 / T2.StandardCost FROM ProductListPriceHistory AS T1 INNER JOIN ProductCostHistory AS T2 ON T1.ProductID = T2.ProductID WHERE T1.ProductID = 858