Q: What is the estimated total Black population of the world?
A: Estimates of the world's Black population range from approximately 800 million to approximately 1.5 billion people. Disagreements over
classification of various identifiable groups as members of particular races, and challenges to census statistics provided by several countries (alleging intentional undercounting)
make reliance on any definitive numbers difficult.

Greater agreement does seem to exist, however, on the percentage of the world's population each racial group represents. With minor variations, the percentages are as follows:
Asian 54%
Black 15%
White 15%
Hispanic 8%
Middle Eastern 8%.