A trader offers a discount of 24% 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 24%? (Answer to be rounded off to 2 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?