Allegedly, the top 50% pays 10.5% of the taxes and the bottom 50% pays 2.8% of the taxes. This is mathematical idiocy.
Nonetheless, that chart is making the rounds.
I believe this is what they mean, but I did not verify.
Allowing for a small rounding error, the numbers cross check in two ways, both totalling 100%.
I recall HowMuch (or someone else) approaching me a while back with that or a similar chart. I would not post it because it was mathematically incorrect. Instead, it is now floating around, flaws and all.