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
Cronulla 32 Canberra 10 -21.2
-1.1
Parramatta 22 Brisbane 14 +7.7
+0.2
Newcastle 12 Penrith 23 -3.3
-0.1
Souths 24 St George 26 +2.4
+0.1
Canterbury 18 Illawarra 12 -1.8
-0.1
Manly 8 Balmain 4 -0.4
+0.0
Week of 8/5100.0*Chance in playoffs100.0*Average seed
Canberra 26 Easts 18 +25.8
+0.8
Brisbane 24 Newcastle 8 -9.4
-0.2
Wests 23 Manly 20 +9.2
+0.2
Balmain 16 Penrith 14 -9.1
-0.1
St George 0 Canterbury 26 -0.1
Illawarra 14 Cronulla 22 -0.1
Souths 14 Gold Coast 14 +0.0
Week of 8/12100.0*Chance in playoffs100.0*Average seed
Gold Coast 4 Canberra 24 In
+1.1
Balmain 20 Brisbane 10 +0.7
+0.0
Penrith 4 Manly 18 +0.4
Games Above .500
Chance Will Make Playoffs