A shopkeeper loses 15%, if an article is sold for Rs. 102. What should be the selling price of the article to gain 20%?

A. Rs. 150
B. Rs. 144
C. Rs. 138
D. Rs. 132
E. None of these
Explanation:
Given that SP = Rs. 102 and loss = 15%
CP = [100(SP)]/(100 – l%) = (100 * 102)/85 = 20 * 6 = Rs. 120.
To get 20% profit, New SP = [(100 + p%)CP]/100 = (120 * 120)/100 = Rs. 144