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
Rebels 31 Stormers 57 +12.5
+15.3
+0.4
Jaguares 29 Bulls 11 +6.6
+15.3
+0.2
Lions 18 Sharks 48 -6.2
Week of 7/8100.0*Chance in playoffs100.0*Home Quarterfinal100.0*Average seed
Lions 57 Kings 21 -0.2
Force 3 Stormers 22 +0.1
Week of 7/15100.0*Chance in playoffs100.0*Home Quarterfinal100.0*Average seed
Stormers 52 Kings 24 +0.3
Jaguares 34 Lions 22 +0.2
Points
Chance Will Make Playoffs