Answer: 20% of households
Step-by-step explanation:
Plato, was a Greek Philosopher. One of the information which can be found in his book titled Republic, was that the richest person in a particular society shouldn't earn above 5 times that of the poorest person.
According to him, he stated that 20% of households, are known to be the upper class and these people earn more wages. On the other hand, the remaining 80% are earned by the middle and lower class.