Ineed 1. how did african american voter registration in louisiana change from 1964 to 1968? (after the civil rights acts) voter registration declined by 50 percent. voter registration almost doubled. voter registration did not change voter registration rose by 10%. 2. which state from the chart had the biggest increase in the percentage of african americans voting? texas mississippi louisiana michigan 3. which state from the chart had the biggest increase in percentage of african americans voting? texas mississippi louisiana michigan