Question : The cost of a pencil is $33\frac{1}{3}$% less than the cost price of a pen. If a man sells 4 pencils at the cost price of 5 pens, what is his profit percentage?

Question : A dealer sells his goods at a 10% loss on the cost price but uses 25% less weight. What is his profit percentage?

Question : A shopkeeper sells his items using a faulty balance which measures 25% less. He then marks up his items 15% above the cost price. If he also gives a discount of 10%, then find his net profit percentage on 1 kg items.

Question : A merchant marks up the price of his goods by 40% more than the cost price. He then sells $\frac{1}{5}$ th of his goods at a discount of 10%, half of the goods at the marked price and the rest of the goods at a discount of 20%. Find his profit percentage.

Question : A man sold 250 chairs and had a gain equal to the selling price of 50 chairs. His profit percent is: