question: How many more, in percentage, of the population in Greensboro were Baptist rather than Presbyterian?
#1 return Greensboro 
#2 return population of #1 
#3 return #2 that were Baptist 
#4 return #2 that were Presbyterian 
#5 return percentage of #3 
#6 return percentage of #4 
#7 return difference of #5 and  #6