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 +23.9
+0.9
Parramatta 22 Brisbane 14 +7.5
+0.3
Cronulla 32 Canberra 10 +1.5
+0.0
Newcastle 12 Penrith 23 -0.7
-0.0
Canterbury 18 Illawarra 12 -0.6
-0.0
Souths 24 St George 26 +0.3
+0.1
Week of 8/5100.0*Chance in playoffs100.0*Average seed
Wests 23 Manly 20 -35.6
-1.2
Balmain 16 Penrith 14 -2.5
Canberra 26 Easts 18 -1.9
-0.1
Brisbane 24 Newcastle 8 -1.2
-0.0
St George 0 Canterbury 26 -0.2
-0.1
Illawarra 14 Cronulla 22 -0.1
-0.1
Week of 8/12100.0*Chance in playoffs100.0*Average seed
Penrith 4 Manly 18 In
+1.3
Gold Coast 4 Canberra 24 -1.8
-0.1
Balmain 20 Brisbane 10 -0.1
+0.0
Games Above .500
Chance Will Make Playoffs