Question

3 'A' buys a radio at 7th of its marked price and sells it at 20% more than the marked price. What is A's gain percent?​

Answer 1

Assuming cost price to be x. The proposed question derives the followed relationship as (1.25x+100)/(x+100)=1.2 =>1.2x+120=1.25x+100. =>0.05x=20 =>x=20/0.05 = 2000/5=400. Ans..