A retailer buys a radio for Rs 225. His overhead expenses are Rs 15. He sellis the radio for Rs 300. The profit percent of the retailer is:

A. 10%   
B. 50%
C. 25%   
D. 52%
Answer:     C

Explanation:     

cost price = (225 + 15) = 240 sell price = 300
gain = (60/240)*100 = 25%