Final answer:
The Three-Fifths Compromise was a compromise reached during the Constitutional Convention of 1787 that determined three-fifths of the enslaved population would be counted for representation and taxation purposes.
Step-by-step explanation:
The Three-Fifths Compromise, which was part of the original Constitution, was a compromise reached during the Constitutional Convention of 1787. It determined that for the purpose of representation in Congress and taxation, three-fifths of the enslaved population would be counted. This compromise gave extra political power to slave states, although not as much as if the total population, both free and enslaved, had been used.