एक कंप्यूटर को 26,000 रुपये में बेचने पर एक व्यक्ति को 4% का लाभ होता है। यदि वह कंप्यूटर को 19,000 रुपये में बेचता है, तो उसकी हानि का प्रतिशत क्या होगा?

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?