How are these numbers calculated?

Big Games

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

Week of 7/19100.0*Chance wins title100.0*Promoted100.0*Average seed
Tottenham Hotspur 2 Roma 3 +30.8
+30.8
+0.4
Real Madrid 1 Manchester United 2 +13.5
+13.5
+0.7
Manchester United 2 Manchester City 0 +11.7
+11.7
+1.4
PSG 2 Tottenham Hotspur 4 +2.5
+2.5
+0.0
Juventus 1 Barcelona 2 +1.7
+1.7
Roma 1 PSG 2 -0.6
-0.6
-0.0
Week of 7/26100.0*Chance wins title100.0*Promoted100.0*Average seed
Barcelona 1 Manchester United 0 -72.8
-72.8
-1.7
Manchester City 3 Tottenham Hotspur 0 No
No
-0.2
Real Madrid 2 Barcelona 3 No
No
-0.0
PSG 2 Juventus 3 +0.0
Roma 1 Juventus 2 -0.1
Points
Chance Will Win Championship