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 +1.3
+0.1
Racing 92 34 Leicester 3 +0.4
+0.0
Leinster 57 Montpellier 3 -0.3
-0.0
Connacht 66 Zebre 21 -0.1
Week of 1/14100.0*Chance in playoffs100.0*Average seed
Northampton 28 Castres 21 -15.5
-1.9
Castres 24 Leinster 24 -5.8
+1.6
Leicester 0 Glasgow 43 -0.7
-0.0
Bordeaux 6 Clermont 9 +0.4
+0.1
Montpellier 26 Northampton 17 -0.2
-0.0
Wasps 17 Toulouse 14 +0.1
+0.0
Exeter 31 Ulster 19 +0.1
Scarlets 22 Saracens 22 -0.1
-0.1
Munster 22 Racing 92 11 +0.1
+0.0
Week of 1/21100.0*Chance in playoffs100.0*Average seed
Sale 25 Scarlets 23 +1.2
+0.3
Saracens 10 Toulon 3 +0.5
+0.1
Ulster 22 Bordeaux 26 -0.3
-0.1
Clermont 48 Exeter 26 +0.2
+0.1
Toulouse 19 Connacht 10 -0.0
Games Above .500
Chance Will Make Playoffs