"I disagree. I think with the right levels of exposure at the early stages of education..."
Right, but that doesn't help today's adults trying to switch careers, as they're past that stage.
"just as most people can perform easy calculations"
That's true by definition, i.e. you would only count a calculation as 'easy' if most people can perform it.
But, based on the results of surveys like the 2015 FINRA financial capability survey, I guess that if you're talking about calculations that >50% of US adults can perform, you're excluding things that most readers of this site would consider 'easy', e.g.:
"What happens if you start with 950, and it grows by 20% each year for 2 years?"
Right, but that doesn't help today's adults trying to switch careers, as they're past that stage.
"just as most people can perform easy calculations"
That's true by definition, i.e. you would only count a calculation as 'easy' if most people can perform it.
But, based on the results of surveys like the 2015 FINRA financial capability survey, I guess that if you're talking about calculations that >50% of US adults can perform, you're excluding things that most readers of this site would consider 'easy', e.g.:
"What happens if you start with 950, and it grows by 20% each year for 2 years?"