How are these numbers calculated?

Big Games

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

Week of 7/1100.0*Chance in playoffs100.0*Home Quarterfinal100.0*Average seed
Jaguares 29 Bulls 11 +29.1
+0.3
Lions 18 Sharks 48 +28.4
+9.6
+0.4
Rebels 31 Stormers 57 -3.9
-0.1
Week of 7/8100.0*Chance in playoffs100.0*Home Quarterfinal100.0*Average seed
Sharks 26 Cheetahs 10 In
+3.0
+0.0
Bulls 50 Sunwolves 3 -0.2
Lions 57 Kings 21 -9.4
-0.1
Force 3 Stormers 22 -0.0
Week of 7/15100.0*Chance in playoffs100.0*Home Quarterfinal100.0*Average seed
Jaguares 34 Lions 22 Yes
+1.0
Sharks 40 Sunwolves 29 +1.4
+0.0
Stormers 52 Kings 24 -0.0
Points
Chance Will Make Playoffs