Answer:
27 people
Explanation:
If 6 chairs are empty, that means 1/4 of the chairs is 6.
6*4 = 24, the total amount of chairs.
24 - 6 = 18, the number of chairs occupied.
If 18 people is 2/3 of the amount of people, if we divide 18 by 2, getting 9, that is 1/3 of the amount of people.
9 * 3 = 27, the total amount of people.