How many percent more was the second largest racial group compared to the third largest?
return racial groups ;return size of #1 ;return #1 where #2 is highest ;return #1 besides  #2 ;return #4 where #2 is highest ;return #4 besides  #5 ;return #6 where #2 is highest ;return percent of #5 ;return percent of #7 ;return difference of #8 and  #9
['select', 'project', 'superlative', 'discard', 'superlative', 'discard', 'superlative', 'project', 'project', 'arithmetic']