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<p>The human brain is rather well-suited for math in general. Personally, then, when someone says “I’m not a math person” or “I’m bad at math” it just means to me that they had a bad math teacher and were not properly inspired or motivated in some way, leading to a dislike. I would guess that most people could be proficient in at least basic mathematics if they desired to be. That’s what sets us apart from the other great apes.</p>
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<p>This is being generous for two reasons. I’d bet that is an overestimate of the percentage of people who actually have it, and you are giving “gluten free” people an awful lot of credit for actually knowing what celiac disease is. I’d guess at least 90% of them don’t know what it is and just jumped on the bandwagon because of some viral website.</p>