^*HOW TO APPEAR SMARTER THAN YOU ARE*
   This is one of my personal favorites: the "1 in ... trick"...
   if you want to be able to impress anywhere in any group, a
   trick: learn to quickly mentally convert "percentages" to "1
   in..." style. It's easy and probably one of the few really good
   uses of math tricks that I know.

   3%= 1 in 33
   10% = 1 in 10
   20% = 1 in 5

   You restate the percentage in those terms and people ALWAYS go,
   "oooh, he smart!"^