A dishonest shopkeeper professes to sell pulses at the cost price, but he uses a false weight of 920gm. for a kg.His gain is …%.
Choose the correct answer.
A) 5.26 %  B) 5.36 %  C) 4.26 %  D) 6.26 %  E) 8.69 %

Rationale: "his percentage gain is 100 * 80 / 920 as he is gaining 80 units for his purchase of 920 units . so 8.69 % . answer : e"
Answer: E