A shopkeeper bought an article for Rs 319.60. Approximately, at what price should he sell the article to make 25% profit?.

A. 400 Rs   
B. 500 Rs
C. 450 Rs   
D. 600 Rs
Answer:  A

Explanation:     

sell price = 125% of 319.60 = (125/100) * 319.60
                                            = 399.50
                                            = 400 Rs