Washington Nationals Playoff Chances 2014-2 50/50

Losing to Mets 0-1 (Top 6th), playoff odds unchanged at 76.7%
64-54-0   .542

How are these numbers calculated?

Big Games

How we did yesterday and who we should root for today.   Explain

Sunday100.0*Chance in playoffs100.0*Average seed
Mets 3 Nationals 1 -2.9
-0.3
Phillies 5 Twins 1 -0.3

What If

Chances based on how well the Nationals finish out the regular season.   Explain

Games Above .500
Chance Will Make Playoffs