A man sells two articles for ₹6,000 each. He gains 50% on the first but loses 25% on the next. His total loss percentage (in %), approximately, will be:

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?