Seattle Mariners Playoff Chances 2015-1 50/50

Lost to Angels 0-2, playoff odds down 25.2 to 42.9%
1-1   .500

How are these numbers calculated?

Big Games

How we did last week and who we should root for this week.   Explain

Week of 4/5100.0*Chance in playoffs100.0*Average seed
Mariners 0 Angels 2 -31.9
-2.3
Mariners 4 Angels 1 +24.9
+2.6
Athletics 1 Rangers 3 +2.6
+0.4
Phillies 0 Red Sox 8 -1.2
-0.2
Rays 5 Orioles 6 +0.9
Astros 2 Indians 0 -0.5
Games Above .500
Chance Will Make Playoffs