Ghost Base Model

how base odds are derived from a win probability

decimal odds D = 1p p = base win probability
fractional 1 − pp : 1 odds against
inverse p = 1D odds → probability
Derive
60%
probabilityp = 0.60
decimal1 / 0.60 = 1.67
fractional(1 − 0.60) / 0.60 = 4/6

Derivation table

Win probability Decimal odds Fractional