That's not correct, dviss1. the three-fifths clause (Article I, Section 2, of the U.S. Constitution of 1787) said that for purposes of representation in Congress, enslaved blacks in a state would be counted as three-fifths of the number of white inhabitants of that state.
The 14th Amendment specifically changed that. First it clarified that "All persons born or naturalized in the United States, and subject to the jurisdiction thereof, are citizens of the United States and of the State wherein they reside. No State shall make or enforce any law which shall abridge the privileges or immunities of citizens of the United States; nor shall any State deprive any person of life, liberty, or property, without due process of law; nor deny to any person within its jurisdiction the equal protection of the laws."
It went on to say, "Representatives shall be apportioned among the several States according to their respective numbers, counting the whole number of persons in each State, excluding Indians not taxed."