How are these numbers calculated?

Big Games

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

Week of 6/30100.0*Chance in playoffs100.0*Home Quarterfinal100.0*Average seed
Sharks 31 Lions 24 -4.1
+18.5
+0.5
Jaguares 25 Stormers 14 +3.2
+6.1
+0.5
Reds 37 Rebels 23 +2.9
+0.1
Sunwolves 42 Bulls 37 +0.2
Highlanders 22 Chiefs 45 -0.2
-0.1
Brumbies 24 Hurricanes 12 -0.1
+0.1
Crusaders 45 Highlanders 22 +0.0
Week of 7/7100.0*Chance in playoffs100.0*Home Quarterfinal100.0*Average seed
Bulls 43 Jaguares 34 -5.0
-36.3
-1.8
Stormers 27 Sharks 16 In
+0.1
Waratahs 77 Sunwolves 25 -0.1
Chiefs 24 Brumbies 19 -0.0
Week of 7/14100.0*Chance in playoffs100.0*Home Quarterfinal100.0*Average seed
Lions 38 Bulls 12 No
-0.7
Sharks 20 Jaguares 10 No
-1.1
Points
Chance Will Make Playoffs