I just read an article which described congestion on a particular line in Japan. Currently the trains are running at 200% capacity, but larger trains were introduced and "the crowding was reduced by ten percent". Later they say that "the trains are now crammed to just 190% capacity".
My question is: shouldn't reducing 200 percent by 10 percent yield 180 percent?
EDIT: Apparently the question is being treated as a math question. I don't really see it this way. Unless the original value is known, both answers (190% and 180%) could be correct. But, for some reason in case of this article it is obvious to the commenters that the correct answer os 190%.
EDIT2: Below is an excerpt from the article:
...trains were introduced to the line, and officials are hoping the new carriages, which are a whole 15cm wider, will reduce crowding by ten percent.