What percentage of marriages end in divorce?

I just had my pre-cana class and they said 50% of all marriages end in divorce. The number goes steeply higher as you re-marry (ie. 60% of second marriages and about 75% of 3rd marriages)....

I have seen the statistic of 93% failed marriages

Studies show that 60% of second marriages end in divorce.

Marriages ending in divorce is very high about seventy percent.

It is difficult to come up with a statistic for "marriages with multiple children that end in divorce". See the several links provided below including a state-by-state chart for divorce rates...