एक व्यक्ति ने एक पंखा खरीदा जिसका अंकित मूल्य 200 रुपये था। यदि उसे 30% और 20% की दो क्रमिक छूटें मिलीं, तो उसने पंखे के लिए कितना भुगतान किया?

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?