Aditya offered an 18% discount on the listed price of an article. After applying the discount, he sold it for ₹615 and made a profit of 25%. What would have been his profit percentage if he had sold the article at the full listed price without any discount? (Rounded off to two decimal places)

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?