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 +0.1
Leinster 57 Montpellier 3 +0.0
Racing 92 34 Leicester 3 -0.0
Racing 92 7 Munster 32 +0.0
Week of 1/14100.0*Chance in playoffs100.0*Average seed
Toulon 27 Sale 12 -0.7
-0.2
Northampton 28 Castres 21 +0.1
-0.1
Bordeaux 6 Clermont 9 +0.1
+0.1
Leicester 0 Glasgow 43 -0.1
+0.1
Exeter 31 Ulster 19 -0.0
Castres 24 Leinster 24 -0.1
Montpellier 26 Northampton 17 +0.1
Munster 22 Racing 92 11 +0.0
Scarlets 22 Saracens 22 -0.1
Week of 1/21100.0*Chance in playoffs100.0*Average seed
Sale 25 Scarlets 23 +7.4
+2.9
Saracens 10 Toulon 3 +0.0
Ulster 22 Bordeaux 26 +0.0
Clermont 48 Exeter 26 +0.0
Toulouse 19 Connacht 10 -0.0
Games Above .500
Chance Will Make Playoffs