What percentage of the Roman population was
was made up
of slaves?

between 20 and 30%

Explanation:

A fairly large percentage of the people living in Rome and Italy were slaves. Historians aren't sure of an exact percentage but somewhere between 20% and 30% of the people were slaves. During the early parts of the Roman Empire, as many as one third of the people in Rome were slaves.

if you're talking about (ww2) they went bankrupt and their currency was worth nothing

explanation:

roosevelt, a progressive reformer, earned a reputation as a "trust buster" through his regulatory reforms and anti-trust prosecutions. his "square deal" included regulation of railroad rates and pure foods and drugs; he saw it as a fair deal for both the average citizen and the businessmen.