The Three-fifths Compromise was an agreement during the Constitution Convention that established that enslaved men and women would be represented in the House at a ratio of 3 to 5 of their actual numbers. Thus, every five individuals would count as three for the purposes of both legislative representation and taxation.
The Three-Fifths Compromise was one of the most notorious provisions of the Constitution. For delegates from the northern states, many of whom were morally opposed to the institution of slavery, the compromise was viewed as a necessary evil in order to secure the ratification of the Constitution since the southern states had threatened to refuse to ratify the document if the interests of southern slaveholders were not protected therein.