Which amendments prohibited denial of the right to vote because of race

The fifteenth Ammendment prohibited denail of the right to vote because of race

Explanation:

The Fifteenth Ammendments to the Constitution of the United States ('XV') states that governments in the United States cannot prevent a citizen from voting because of their race, color, or prior condition of servitude (slavery). It was ratified on February 3, 1870. Its basic objective was to grant the right to vote to former slaves.

The Voting Rights Act in 1965, made it possible to achieved the full promise of the fifteenth amendment in all states.