840 रुपये अंकित मूल्य वाली एक वस्तु को 714 रुपये में बेचा जाता है। छूट प्रतिशत क्या है?

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?