How are these numbers calculated?

Big Games

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

Week of 1/11100.0*Chance in playoffs100.0*Promoted100.0*Average seed
Saints 18 Castres 12 +1.6
+1.6
+0.7
Ulster 23 Glasgow 6 -1.0
-1.0
-0.1
Quins 47 Connacht 8 +0.1
Week of 1/18100.0*Chance in playoffs100.0*Promoted100.0*Average seed
Glasgow 27 Saints 20 Out
No
Games Above .500
Chance Will Make Playoffs