90 percent of people live in the northern hemisphere

An estimated 90% of the population of the Earth lives in the Northern Hemisphere. This is because approximately 6.57 billion people, of the total human population of 7.3 billion, live north of the equator.

https://inshorts.com/en/news/90-of-earths-population-lives-in-northern-hemisphere-1487235613826

http://www.businessinsider.com/90-of-people-live-in-the-northern-hemisphere-2012-5?IR=T