Answer:
He can only feed 8 people.
Step-by-step explanation: He can only feed 8 people because if each person gets 2/3 of a sandwich 1 person gets 2/3 of a sandwich the other gets another 2/3, etc. and you'll be left with 6 people eating a sandwich. But then the leftovers for that people = a whole sandwich so basically he will be able to feed 8 people.