question: As of 2000, how many in percent of households had someone living alone who wasn't 65 years of age or older?
#1 return households 
#2 return #1 that had someone living alone 
#3 return #2 who  was  65 years of   age or  older 
#4 return #3 As of   2000 
#5 return percent of   #4 
#6 return difference of   100 and  #5