Under the Articles of Confederation, tax on a state was based on population. Non-slave states wanted slaves counted so that the slave states would bear more of the tax burden. Slave states did not want slaves counted because it would mean higher taxes. Under the Constitution a bigger population meant more influence in Congress and in electing a President. Now the slave states wanted slaves counted so they could have more influence. The non-slave states wanted slaves not to be counted to keep the slave states from having more influence. How is that backwards?
Here is what I originally said:,
Under the old pre-1789 Articles of Confederation, each state would pay a tax to the central government based on population, The states that opposed slavery wanted slaves counted, The slave states did not.The compromise hammered out was that a slave was to be counted as 3/5 of a person for taxation purposes. When the Constitution was being written, it provided that representation in the House of Representatives would be based on population as well as influencing Electoral College votes. Now the slave states wanted slaves to be counted but the non-slave states did not. The compromise reached without which the Constitution would not have been ratified was again the 3/5 rule borrowed from the old Articles of Confederation.