question: Which had the highest percentage of teachers in the obligatory, schools or private?
#1 return schools 
#2 return private 
#3 return teachers in  the  obligatory of #1 
#4 return teachers in  the  obligatory of #2 
#5 return percentage of #3 
#6 return percentage of #4 
#7 return which is the  highest of #5 ,  #6