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
Newcastle 12 Penrith 23 +10.7
+0.8
Parramatta 22 Brisbane 14 +2.1
+0.1
Cronulla 32 Canberra 10 +1.3
-0.0
Canterbury 18 Illawarra 12 -1.2
-0.2
Manly 8 Balmain 4 +0.4
-0.0
Souths 24 St George 26 +0.3
Week of 8/5100.0*Chance in playoffs100.0*Average seed
Canberra 26 Easts 18 -4.5
-0.1
Balmain 16 Penrith 14 -4.5
-0.8
Brisbane 24 Newcastle 8 -1.2
-0.1
St George 0 Canterbury 26 -0.4
-0.2
Illawarra 14 Cronulla 22 -0.4
-0.2
Wests 23 Manly 20 +0.1
+0.1
Week of 8/12100.0*Chance in playoffs100.0*Average seed
Gold Coast 4 Canberra 24 -15.1
-0.2
Balmain 20 Brisbane 10 +5.4
+0.1
Penrith 4 Manly 18 -4.9
-1.8
Canterbury 14 Souths 18 +0.2
Cronulla 16 St George 14 -0.2
Games Above .500
Chance Will Make Playoffs