"Before I attended Northwestern, I was under the illusion that it was a prestigious school where I would meet extraordinary individuals. However, the only people I met were not-so-special, wealthy, haughty, and imperious ones, who consisted of 90% attitude."
From https://www.yelp.com/biz/northwestern-university-evanston-2
How to understand "90% attitude" here? Does it mean 90% of the student body has that attitude?
It means that these people had no substance to them. They were mostly bluster. )
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
It means that these people had no substance to them. They were mostly bluster. (10% intelligent speech, 90% boasting, bragging or yacking and yammering about trivial things.)