An agreement to count slaves as 3/5 of a person was related to
a. The number of senators each state would have
b. The creation of an upper and lower house in congress
c. The denial of African-Americans the right to vote
d. Way in which population would be counted in each state

D. Way in which population would be counted in each state.

When the founders were writing the Constitution, there came the problem with representation. Each state has an amount of representation based on the population of that state. The more population, the more representatives. They counted each free person and indentured servant. And 3/5 of all other person, including slaves and Indians. This was proposed this compromise to get the support of Georgia, North Carolina, and South Carolina.