How many states had to approve the Constitution in order for it to become the supreme law of the land?

Question

How many states had to approve the Constitution in order for it to become the supreme law of the land?

Answer 1

Not sure I think two thirds.  BUT what is the difference since the Constitution is ignored by all 3 branches of govt today.

Answer 2

9 of 13 had to ratify for it to become law. All 13 eventually ratified it but during a span from 1787 to 1790 with Rhode Island being the last

Answer 3

I think it was 9 out of 13.

Answer 4

Nine Colonies had to ratfy it for it to become law (9 of 13) however, for the Amendments all 13 Colonies had to ratify for the Amendment to become Law.