Win% represents the percent games played that were won.
Games Won + ( Games Tied × 0.5 ) ) ÷ Games Played = Win%
( 9 + ( 0 × 0.5 ) ) ÷ 10 = 90.0%
SOS1 represents the average of opponents' Win% for each game.
AVERAGE(
) = 0.537
SOS2 represents the average of opponents' SOS1.
AVERAGE(
) = 0.565
RPI represents the Ratings Percentage Index
( 40% × Win% ) + ( 40% × SOS1 ) + ( 20% × SOS2 ) = RPI
( 40% × 0.900 ) + ( 40% × 0.537 + ( 20% × 0.565 ) = 0.688
( 0.360 ) + ( 0.215 ) + ( 0.113 ) = 0.688