A man sold an article for ₹2,320 and made a profit of 16% in the process. What would have been his profit or loss percentage if he had sold it for ₹2,100?

A company considers hiring an extra machine for $150 per day to produce additional units. If the additional throughput contribution generated from producing these units on the machine is $390, by how much will total profit increase?

If the cost price of an article is 85 times its selling price, what is the loss percentage?