In The Princeton Review
I found an "upper-medium" problem:
The output of a factory was increased by 10% to keep up with rising demand. To handle the holiday rush, this new output was increased by 20%. By approimately what percent would the output now have to be decreased in order to restore the original output?
The correct answer for this problem is written to be B) 24%
I Cannot understand why. I think its 32%.