A dishonest dealer professes to sell goods at the cost price but uses a weight of 800 grams per kg, what is his percent?
Select:  A) 65%  B) 67%  C) 45%  D) 78%  E) 25%
25%   800 --- 200   100 --- ? =&gt; 25%
<result>E</result>
A dishonest dealer professes to sell goods at the cost price but uses a weight of 800 grams per kg, what is his percent?