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
Sunwolves 12 Waratahs 57 +18.3
+12.6
+0.8
Brumbies 43 Reds 24 -8.3
-15.4
-0.6
Kings 37 Highlanders 10 +7.4
+0.1
Hurricanes 37 Blues 27 -1.5
+0.0
Chiefs 23 Crusaders 13 -1.4
Rebels 31 Stormers 57 +0.3
+0.1
Week of 7/8100.0*Chance in playoffs100.0*Home Quarterfinal100.0*Average seed
Waratahs 17 Hurricanes 28 -24.0
-25.3
-1.2
Jaguares 8 Highlanders 34 -7.3
-0.1
Blues 40 Brumbies 15 +3.4
+18.8
+0.5
Week of 7/15100.0*Chance in playoffs100.0*Home Quarterfinal100.0*Average seed
Brumbies 24 Force 10 Out
No
-2.0
Blues 34 Waratahs 28 Out
No
-1.4
Points
Chance Will Make Playoffs

Lottery

We are out of the playoffs. Here are the big games and what ifs for draft seeds.
Although it might be more fun to go down swinging.

Big Games

Week of 7/1100.0*Lottery seed
Sunwolves 12 Waratahs 57 -1.2
Brumbies 43 Reds 24 +0.8
Kings 37 Highlanders 10 -0.1
Jaguares 29 Bulls 11 -0.1
Hurricanes 37 Blues 27 -0.0
Rebels 31 Stormers 57 -0.0
Week of 7/8100.0*Lottery seed
Waratahs 17 Hurricanes 28 +1.7
Blues 40 Brumbies 15 -0.8
Jaguares 8 Highlanders 34 +0.1
Force 3 Stormers 22 +0.1
Bulls 50 Sunwolves 3 +0.1
Week of 7/15100.0*Lottery seed
Brumbies 24 Force 10 +2.7
Blues 34 Waratahs 28 +2.0
Cheetahs 17 Bulls 43 +0.3