How are these numbers calculated?

Big Games

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

Week of 8/11100.0*Chance in playoffs100.0*Average seed
TheRoughriders 3 JoeysBar 9 +13.6
+0.1
Lumberhacks 2 TheStickyBandits 4 +10.7
+0.3
Week of 8/18100.0*Chance in playoffs100.0*Average seed
TheStickyBandits 9 TheRoughriders 8 In
+0.2
JoeysBar 6 SlushPuppies 11 -0.2
TheStickyBandits 6 TheRoughriders 6 -0.2
Week of 8/25None
Points
Chance Will Make Playoffs