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
Sharks 6 Montpellier 27 -0.2
Leinster 33 Scarlets 14 -13.9
-0.3
Zebre 6 Biarritz 32 -9.9
-0.2
Ulster 23 Glasgow 6 +1.2
Saints 18 Castres 12 +1.2
Ospreys 15 Tigers 15 -0.4
+0.0
Quins 47 Connacht 8 +0.4
Week of 1/18100.0*Chance in playoffs100.0*Promoted100.0*Average seed
Munster 29 Racing Métro 6 Out
-0.2
Treviso 17 Ospreys 14 +0.2
Games Above .500
Chance Will Make Playoffs