How are these numbers calculated?

Big Games

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

Week of 7/29100.0*Chance in playoffs100.0*Average seed
Manly 8 Balmain 4 -20.2
-0.8
Parramatta 22 Brisbane 14 +7.5
+0.2
Cronulla 32 Canberra 10 +2.0
+0.1
Newcastle 12 Penrith 23 -1.0
-0.0
Canterbury 18 Illawarra 12 -0.5
-0.0
Souths 24 St George 26 +0.2
+0.1
Week of 8/5100.0*Chance in playoffs100.0*Average seed
Balmain 16 Penrith 14 +16.4
+0.5
Wests 23 Manly 20 +7.4
+0.1
Canberra 26 Easts 18 -4.1
-0.1
Brisbane 24 Newcastle 8 -0.4
-0.1
St George 0 Canterbury 26 -0.3
Illawarra 14 Cronulla 22 -0.1
Souths 14 Gold Coast 14 +0.0
Week of 8/12100.0*Chance in playoffs100.0*Average seed
Penrith 4 Manly 18 -58.1
-0.6
Balmain 20 Brisbane 10 +34.4
+0.9
Gold Coast 4 Canberra 24 -4.3
-0.1
Games Above .500
Chance Will Make Playoffs