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 +24.0
+1.1
Parramatta 22 Brisbane 14 +4.4
+0.2
Canterbury 18 Illawarra 12 -2.0
-0.1
Newcastle 12 Penrith 23 -1.6
-0.1
Cronulla 32 Canberra 10 +1.5
Souths 24 St George 26 +1.3
+0.1
Week of 8/5100.0*Chance in playoffs100.0*Average seed
Wests 23 Manly 20 -16.6
-0.9
Canberra 26 Easts 18 -6.5
-0.2
Brisbane 24 Newcastle 8 -4.4
-0.1
Balmain 16 Penrith 14 -3.1
+0.0
Illawarra 14 Cronulla 22 -0.3
-0.2
St George 0 Canterbury 26 -0.2
-0.2
Week of 8/12100.0*Chance in playoffs100.0*Average seed
Penrith 4 Manly 18 In
+1.2
Gold Coast 4 Canberra 24 -4.3
-0.3
Balmain 20 Brisbane 10 +0.0
Games Above .500
Chance Will Make Playoffs