Most definitely not.
Of course, it depends on how you define "white". Where do you draw the line? There are MANY different ethnic groups-- not just black, white, or Oriental. For example, Latin America has many people who are part Spanish and part Native American. Do they count as white, or not?
About 1 billion people live in China, and another 1 billion in Inda. That's 2 out of the 6.5 billion of the world's population. Those two Asian countries alone count as 30% of the world's population. And that's not counting Africans, Native Americans, Middle Eastern people, Native Australians, people from all the other populous East Asian countries (Japan, Korea, Thailand, Cambodia, the Phillipines, etc.), Latin Americans, etc. (if all those people don't "count" as white). 80% of the world is NOT white.