How many percentage points difference is there between the number of people 18 years old and under and those who are 18 to 24 years old?
return people ;return #1 who  are 18 years  old  and  under ;return #1 who  are 18 to 24 years  old  ;return percentage of #2 ;return percentage of #3 ;return difference of #4 and  #5
['select', 'filter', 'filter', 'project', 'project', 'arithmetic']