Two successive discounts, the first being 14 1/2%, were given on an article having a marked price of Rs. 12,500. Finally, it was sold for Rs. 9,405. How much was the second discount?

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?