An article is sold at a certain price. By selling it at 2/3 of that price one loses 10%. Find the gain percent at original price? Choose the correct choice from the following answers:
A) 25 %
B) 20 %
C) 35 %
D) 40 %
E) 50 %

Rationale: let the original s . p . be $ x then , new s . p . = $ 2 / 3 x loss = 10 % c . p . = 100 / 90 * 2 / 3 x = 20 x / 27 c . p . = 20 x / 27 gain = x - 20 x / 27 = 7 x / 27 gain % = 7 x / 27 * 27 / 20 x * 100 = 35 % answer is c
Answer: C