Answer:
In the slave era, the African Americans who were slaves had little to no rights in America as they engaged in unpaid labor and were treated very harshly by their masters.
What was the Three-Fifth Compromise?
This refers to the legislation which stated that every slave would be counted as a three fifth of a person in cases of representation and tax purposes.
As a result of this compromise, the Southern States had more advantage because of the number of slaves which gave them greater electoral powers.
note that your question is incomplete so I gave you an overview to help you better understand :)