It's a reference to the law which was made that slaves would count for 3/5ths of a person when tallying population for representation in the legislative branch of the new American government.
The thirteenth amendment.
The three-fifths clause provided for counting three-fifths of all slaves for purposes of representation in Congress.
citizens
I believe it refers to slaves.
minus three fifths
Assuming that you mean "fifths", the answer is three fifths.
six and three fifths
Three fifths of a hundred is sixty.
two fifths
Three fifths of fifty is 30.
the south were very complex in their organizing
The Three-fifths Compromise was proposed by delegates James Wilson and Roger Sherman during the 1787 United States Constitutional Convention. The three fifths clause stated that slaves counted as only three-fifths of a person.The three-fifths compromise was a strongly anti-slavery provision put into the Constitution. It was written in order to block the pro-slavery south from gaining additional representation in Congress by counting slaves as a full person for census purposes, even though the same slaves did not have the right to vote. It was added as Article 1, Section 2, Paragraph 3 to the United States Constitution. It is often referred to as the 3-5 clause, even though it was The Three-fifths Compromise.It was superceded and thereby rescinded or abolished by the 14th Amendment in 1868, which gave black Americans the same rights as all other citizens.