How are these numbers calculated?

Big Games

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

Week of 8/18None
Week of 8/23100.0*Chance in playoffs100.0*Average seed
DudleyAvalanche 1 LordStanleysCup 6 +8.2
+0.2
Nordekes 4 Hellfish 4 +0.5
+0.0
Week of 8/31100.0*Chance in playoffs100.0*Average seed
PondScum 6 UnionTavern 0 In
+0.7
DudleyAvalanche 0 BaystateBulldogs 4 -2.2
-0.0
Hellfish 3 Jackals 2 -0.1
Points
Chance Will Make Playoffs