एक मशीन को 2000 रुपये में बेचने पर 20% की हानि होती है। यदि इसे इसके बजाय 3000 रुपये में बेचा जाता है, तो लाभ या हानि प्रतिशत ज्ञात कीजिए।

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?