How are these numbers calculated?

Big Games

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

Week of 5/2100.0*Chance in playoffs100.0*Average seed
Exeter 29 Harlequins 30 +23.8
+0.3
Week of 5/10100.0*Chance in playoffs100.0*Average seed
Harlequins 19 Bath 16 In
+0.4
Games Above .500
Chance Will Make Playoffs