How many percent higher was the average family size compared to the average household size?
return families ;return households ;return sizes of #1 ;return sizes of #2 ;return the  average of #3 ;return the  average of #4 ;return the  division of #5 and  #6 ;return the  difference of #7 and  one ;return the  multiplication of #8 and  100
['select', 'select', 'project', 'project', 'aggregate', 'aggregate', 'arithmetic', 'project', 'project']