How are these numbers calculated?

Big Games

How we did yesterday and who we should root for today.   Explain

Sunday, 7/5100.0*Chance in playoffs100.0*Round of 4100.0*Average seed
Tahiti 2 Vanuatu 1 +6.2
+6.2
-0.0
Papua New Guinea 0 New Zealand 1 -0.1
Monday, 7/6100.0*Chance in playoffs100.0*Round of 4100.0*Average seed
Vanuatu 46 Micronesia 0 -3.2
-3.2
-0.0
Tuesday, 7/7100.0*Chance in playoffs100.0*Round of 4100.0*Average seed
Tahiti 0 Fiji 0 In
Yes
-0.5
New Caledonia 0 New Zealand 5 -0.1
Points
Chance Will Make Playoffs