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
Toulouse 35 Treviso 14 -12.3
+0.1
-0.6
Ospreys 15 Tigers 15 -12.3
+2.1
-0.6
Sharks 6 Montpellier 27 -0.4
Ulster 23 Glasgow 6 +0.1
+0.5
Saints 18 Castres 12 +0.1
+0.5
Leinster 33 Scarlets 14 -0.1
Zebre 6 Biarritz 32 -0.1
Week of 1/18100.0*Chance in playoffs100.0*Promoted100.0*Average seed
Tigers 9 Toulouse 5 In
Yes
+2.5
Games Above .500
Chance Will Make Playoffs