How are these numbers calculated?

Big Games

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

Week of 8/14100.0*Chance in playoffs100.0*Home Advantage100.0*Average seed
Southern 2 Dunedin 13 In
+4.4
+0.1
West Auckland 8 Canterbury 7 (ot)+1.2
+6.7
+0.1
West Auckland 6 Canterbury 5 Yes
Week of 8/21None
Points
Chance Will Make Playoffs