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 +1.6
+0.1
Leinster 57 Montpellier 3 +0.5
+0.0
Racing 92 34 Leicester 3 +0.4
+0.0
Connacht 66 Zebre 21 -0.1
Week of 1/14100.0*Chance in playoffs100.0*Average seed
Leicester 0 Glasgow 43 -2.8
-0.1
Toulon 27 Sale 12 +2.2
+0.3
Northampton 28 Castres 21 +1.1
+0.1
Bordeaux 6 Clermont 9 +1.0
+0.1
Castres 24 Leinster 24 +0.9
Montpellier 26 Northampton 17 -0.6
-0.0
Exeter 31 Ulster 19 +0.4
Scarlets 22 Saracens 22 -0.3
-0.1
Munster 22 Racing 92 11 +0.2
+0.0
Wasps 17 Toulouse 14 +0.2
+0.0
Week of 1/21100.0*Chance in playoffs100.0*Average seed
Saracens 10 Toulon 3 -5.8
-0.5
Sale 25 Scarlets 23 +3.0
+0.1
Toulouse 19 Connacht 10 -2.7
-0.0
Zebre 27 Wasps 41 -0.9
-0.0
Ulster 22 Bordeaux 26 -0.9
-0.0
Clermont 48 Exeter 26 +0.6
+0.1
Games Above .500
Chance Will Make Playoffs