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
Connacht 66 Zebre 21 +1.5
+0.2
Glasgow 12 Munster 14 +1.4
Leinster 57 Montpellier 3 +0.4
Racing 92 34 Leicester 3 +0.3
Week of 1/14100.0*Chance in playoffs100.0*Average seed
Wasps 17 Toulouse 14 +1.9
+0.1
Northampton 28 Castres 21 +0.9
Leicester 0 Glasgow 43 -0.6
Bordeaux 6 Clermont 9 +0.4
-0.0
Castres 24 Leinster 24 +0.3
Montpellier 26 Northampton 17 -0.2
Exeter 31 Ulster 19 +0.1
Scarlets 22 Saracens 22 -0.1
+0.0
Munster 22 Racing 92 11 +0.1
-0.0
Toulon 27 Sale 12 -0.1
Week of 1/21100.0*Chance in playoffs100.0*Average seed
Toulouse 19 Connacht 10 -20.6
-3.8
Sale 25 Scarlets 23 +0.8
+0.0
Saracens 10 Toulon 3 +0.3
-0.0
Ulster 22 Bordeaux 26 -0.2
Clermont 48 Exeter 26 +0.2
-0.0
Games Above .500
Chance Will Make Playoffs