What percent were eligible to become members of the smaller Council of 500
The Spartan council did not rule Athens.
Sparta was an aristocracy that had a Council of Elders. Athens was a democracy. It had a council too, of 500 men over 30 years old.
Athens.
Athens.
The Council of 500 would vote on who to put in the council and who not to put on the council.
Athens had a large council of 500 with 50 on duty 24/7 to handle any contingency which arose. The number of Councillors was necessary as they were chosen by lot from amongst all the citizens, without regard to their capabilities - having large numbers was based on the odds of there being a good chance that there would be competent people amongst them to offset the dummos. So having a smaller council would have been very risky.
In Athens each of the ten tribes elected 50 members to the Council.
Athenian democracy was not at all the same concept as modern democracy, so therefore there was no democratically elected ruler, but rather a council of all those eligible who made decisions on anything and everything.
The citizens in fortnightly Assembly considered and decided on the proposals put before them by the Council. The Council then implemented the decisions of the Assembly. Ten percent of the Council was, in turn, on duty 24 hours each day to handle any problems which arose.
The Ancient Athens Government was structured by the council of 500 people, the Assembly and finally the court. I hope that this information will help you.
archon
The Boule (Council of 500) met in the Bouleterion in Ancient Athens.