How many people in the world are illiterate?
According to this site, 796 million worldwide. http://www.worldliteracyfoundation.org/interim-report.htmlOther estimates say 867 million to 1 billion. There doesn't seem to be a perfect answer. People use stats to estimate. Sorry! Hope that helped some!
Judging by some of the questions on this site, way too many. Actually about 1billion or just over 1/4 of the world's adult population.
Way too many