[nandemo]

I'm not claiming grandparent's number is correct, but it's at least plausible:

> A 2000 poll held by the Russian Public Opinion Fund found that 28% of those surveyed did not believe that American astronauts landed on the Moon, and this percentage is roughly equal in all social-demographic groups.[19] In 2009, a poll held by the United Kingdom's Engineering & Technology magazine found that 25% of those surveyed did not believe that men landed on the Moon.[20] Another poll gives that 25% of 18–25-year-olds surveyed were unsure that the landings happened.[21]

Note that a belief that "man never landed on moon" could be just out of ignorance, not necessarily a belief in a conspiracy. And considering that both the UK and Russia have relatively very high educational standards, it's not hard to believe the percentage is much higher elsewhere.

> Like s slight portion of those believing that 9/11 was a CIA/Israeli job,

"Slight portion"? Citation needed. :-)