The time served is normally 85% of the sentence imposed. First time offenders are treated the same as most other offenders, but in this case a probation violation might yield him some earlier release if he is a model inmate but do not rely on this suggestion. "Might" means if there is overcrowding and he is not getting incident reports, etc they could let him go before the 85% but we would treat this like a 10 1/2 month sentence and be surprised if he gets out earlier - tell him to behave :)