A shopkeeper sells his goods at cost price but uses a faulty meter that weighs 800 grams. Find the profit percent.
Choose the correct choice from the following answers:
A) 20
B) 15
C) 25
D) 18
E) 19
Explanation:   (100 + g) / (100 + x) = True measure / Faulty measure   x = 0   true measure = 1000   faulty measure = 800   100 + g / 100 + 0 = 1000 / 800   100+g = 5/4*100   g = 25   ANSWER: 25
<result>C</result>
A shopkeeper sells his goods at cost price but uses a faulty meter that weighs 800 grams. Find the profit percent.