A single discount of 50% is given on the marked price of an article which is Rs. 1050. If instead, two successive discounts of 40% and 10% are given, what will be the difference between both selling prices?

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?