Since you were curious enough to ask, these two countries together are responsible for slightly less than 1/4 (or 23.3%) of the estimated total CO2 released by human beings through economic activity. Your numbers, wherever you got them, are made up since 2/3 = 66.6% . If you think about the size of the Chinese and Indian economies than you will understand this. The key word in that previous sentence was for you to "think".
http://en.wikipedia.org/wiki/List_of_countries_by_carbon_dioxide_emissions
Glenn Beck said 2/3 the other day. It’s that’s wrong then so be it