what effect did the three-fifths compromise have on southern states?

it helped increase the number of slave trade.
it gave the south the power to outvote the north.
to limit the number of states that allowed slavery
it gave those states more representation in congress

The three-fifths compromise had the effect of giving southern states more representation in Congress. According to this compromise, each slave was counted as three-fifths of a person for the purpose of determining a state's population, which in turn determined its number of representatives in the House of Representatives. This situation allowed southern states, where slavery was prevalent, to have greater representation and influence in Congress compared to the northern states.