A trader offers a discount of 10% on an article if a customer makes the payment in cash. How much percentage above the cost price should he mark the article to make a profit of 10%? [Give your answer correct to 2 decimal places.]

A merchant raised the price of his products by 32%. What percentage discount (rounded off to one decimal place) should he give so as to sell the products on a no profit, no loss basis?

A shopkeeper offers the following two schemes: I. Two successive discounts of 30% and 45%. II. Buy 4, get 5 free. The single percentage discount (rounded off to two decimal places) from each scheme, respectively, is: