The amendments are approved at the national level usually by congress and proposed to the states.
mee
All amendments to the constitution must be approved at the end of a national convention assembled at the request of the legislatures.
there are 35 amendments to the Kentucky constitution
a two thirds vote of congress
yes
yes
There are no "informal" amendments. All 26 amendments are approved by Congress and are part of the constitution. Your question makes the assumption that there are two constitutions and there isn't.
James Madison proposed 12 amendments to the Constitution, 10 of which were approved. The ones that weren't would have established Congressional representation and prohibited Congress from raising its own salaries.
true
It depends on the state, but often they are ratified through legislature or propositions.
Amendments to the constitution must be ratified by the states. To become part of the Constitution the Amendment must be approved by three-fourths of the states.