please help me - what is the formula of this site ?

[saadat68]

hi

I use this site for soccer betting

vitibet.com

I test a system for soccer betting now and use predictions of this site in win , lost or draw

But i need their formula that i use for my system in other leagues

who can explain to me how to calculate the percentage probabilities for wins, losses, and draws? What's the formula used?

For example why prediction of this game is :

Valencia CF - Real Sociedad

1 : 53 %

draw : 26 %

2 : 22 %

Thanks a lot