The question asks for how many more, not how many times more, indicating subtraction. 180,000 or E5oh darn...
The question specifically asked for percentage. According to Google it's 1/3,748,067 or about 3E-7 not E-5 (though sources do change I don't realistically think it's as high as E-5).
Edit:How many more people are diagnosed with esophageal cancer each year in the US than are diagnosed with mesothelioma?
I don't know if you'll be able to verify an answer to this question later, but here goes anyways:
If I had as many copies of the Beowulf, Heaney translation, as would be as long as all the forums posts made on this website since 2008, how much would they weigh? (assume all the books are paperback)
Also could you clarify the question? Like a copy for any post? Every page? Every thread?