continue here.

http://www.pagalguy.com/forums/quantitative-ability-and-di/percentages-profit-loss-interest-t-81003

and here

http://www.pagalguy.com/forums/quantitative-ability-and-di/official-quant-thread-cat-2012-t-83384

but what is the explanatory answer on it.

is it 20%

plz someone give me the explanatory solution for this problem

Q) A dishonest dealer markup the price of his goods by 20% and gives a discount of 10% to the customer. He also uses a 900 gram weight instead of a 1 kilogram weight. Find his percentage profit due to these maneuvers

a)8% (b)12% (c)20% (d)16% (e)None of these