From 90% to 66% in One Gun Grabbing Swoop

It must be the new but liars figure math.

Here is a quote from a testimony by gun grabber extraordinaire Diane Feinstein discoursing with Mr GunWalker Lanny Breuer.

FEINSTEIN: So clearly over two-thirds of the weapons used in Mexico by cartels are coming from the United States.

BREUER: That's correct, Senator.

So, how many of that 66% are guns sold by America to Mexican military who then puts them in the hands of drug cartels is Gun Shy's next question, and if the 90% lie is now provably wrong, why should we even entertain the new and improved 66% lie?