The population of slaves would be calculated as three-fifths in total when allocating Representatives, as well as Presidential voters and taxes. The Three-Fifths Compromise was introduced by James Wilson and Roger Sherman, who were both members of the Constitutional Convention of 1787.
The Three-Fifths Compromise resolved the issue of whether the slaves could be used to determine the number of representatives a state could have. The compromise stated that a slave would count for 3/5 of a person when counting for representation in Congress.
