How are these numbers calculated?

Big Games

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

Week of 1/7100.0*Chance in playoffs100.0*Average seed
Glasgow 12 Munster 14 +0.3
+0.1
Leinster 57 Montpellier 3 +0.1
+0.0
Racing 92 34 Leicester 3 +0.1
-0.0
Racing 92 7 Munster 32 +0.0
Week of 1/14100.0*Chance in playoffs100.0*Average seed
Northampton 28 Castres 21 +5.1
+1.6
Montpellier 26 Northampton 17 Out
-1.2
Leicester 0 Glasgow 43 -0.3
+0.1
Bordeaux 6 Clermont 9 +0.1
+0.1
Castres 24 Leinster 24 *+0.1
-0.1
Exeter 31 Ulster 19 +0.1
-0.0
Wasps 17 Toulouse 14 +0.0
Scarlets 22 Saracens 22 -0.1
Munster 22 Racing 92 11 +0.0
Week of 1/21100.0*Chance in playoffs100.0*Average seed
Sale 25 Scarlets 23 -0.3
Ulster 22 Bordeaux 26 +0.1
Clermont 48 Exeter 26 +0.0
Saracens 10 Toulon 3 +0.0

* A starred number could be exactly 0 or just really small. The simulation did not run long enough to know.

Games Above .500
Chance Will Make Playoffs