This math is some kind of war crime. 375, 15/4, and 21% are radically different numbers, and only the third one represents a probability or “chance”.

15/4 appears to actually mean her odds are 15 to 4 to lose, as her odds of winning, about 21%, matches up with 4/19, i.e. 4 to 15 odds of winning.

And I have no idea what the hell 375 is supposed to mean.