If the price of an article went up by 20%, then by what percent should it be brought down to bring it back to its original price?

A. 16 2/3%
B. 20%
C. 22 1/3%
D. 15%
E. None of these
Explanation:
Let the price of the article be Rs. 100.
20% of 100 = 20.
New price = 100 + 20 = Rs. 120
Required percentage = (120 – 100)/120 * 100
= 20/120 * 100 = 50/3 = 16 2/3%.