The image and number comes from the Credit Suisse report[1]. Inside of it, they describe their methodology, which explains the discrepancy.
> "More specifically, since children have little formal or actual wealth ownership, we focus on wealth ownership by adults, defined to be individuals aged 20 or above."
[1](page 5): https://publications.credit-suisse.com/tasks/render/file/?fi...
Seems a rather important detail to omit.
> Obviously billionaires like Bill Gates, Warren Buffett and Mark Zuckerberg are part of the 1%. But who else is? According to Credit Suisse, another 47m people
There are 7 billion people in this world. 1% of that is 70 million, not 47 million.
Never trust journalists writing about statistics (or anyone who hasn't studied statistics, they probably have no idea what they're talking about) (on second thought, don't trust people who have studied statistics either; they now enough to manipulate you).