Two offers were being made to Swaroop for a watch with a marked price of Rs. 1,600. Either two successive discounts of 20%, or two successive discounts of 30% and 10% after each other is offered. If Swaroop opted for the better plan over the other, how much more must he have saved?

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?