The 50% number is actually horribly exaggerated. It is closer to 30%. I'll dig up sources later, but basically the divorce rate is calculated by dividing the number of new marriages with the number of divorces in a given year.
This doesn't account for repeat offenders (people on their second, third, or tenth divorce) or age or region or any number of factors that can affect your chances of remaining married.
This doesn't account for repeat offenders (people on their second, third, or tenth divorce) or age or region or any number of factors that can affect your chances of remaining married.