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
Lions 18 Sharks 48 -12.8
-0.1
Rebels 31 Stormers 57 +11.7
+20.6
+0.3
Jaguares 29 Bulls 11 +9.3
+27.5
+0.4
Week of 7/8100.0*Chance in playoffs100.0*Home Quarterfinal100.0*Average seed
Lions 57 Kings 21 -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 +0.7
Stormers 52 Kings 24 +0.0
Points
Chance Will Make Playoffs