Win% represents the percent games played that were won.
Games Won + ( Games Tied × 0.5 ) ) ÷ Games Played = Win%
( 4 + ( 0 × 0.5 ) ) ÷ 5 = 80.0%
SOS1 represents the average of opponents' Win% for each game.
AVERAGE(
50.0%
0.0%
0.0%
50.0%
25.0% ) = 0.250
SOS2 represents the average of opponents' SOS1.
AVERAGE(
0.555
0.900
0.721
0.620
0.575 ) = 0.674
RPI represents the Ratings Percentage Index
( 40% × Win% ) + ( 40% × SOS1 ) + ( 20% × SOS2 ) = RPI
( 40% × 0.800 ) + ( 40% × 0.250 + ( 20% × 0.674 ) = 0.555
( 0.320 ) + ( 0.100 ) + ( 0.135 ) = 0.555