Ms. Sharma bought a house for Rs. C in 2010. Three years later she sold the house for 25% more than she paid for it. She has to pay a tax of 50% on the gain (where gain is the selling price minus the cost price). How much tax must Ms. Sharma pay?

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?