Ha!  I wasn't saying the population IS 5.7M, I was showing you how the percentage would still round to 23% if population WAS 5.7M instead of the 5.6M that it is.  It was a simple illustration to disprove your characterization (not simple enough, apparently).  

Oh, and we weren't given just "1.3M on Medicaid", we were given "more than 1.3M".

FACT: "More than 1.3M" out of a total population of 5.6M is more than 23%.

FACT:  More than 23% is closer to 1-in-4 (25%) than it is 1-in-5 (20%).

You're the one trying to distort the facts.