This flow chart describes how a constitutional amendment is proposed and how it is ratified. Constitutional amendments can be proposed in two ways; either by a 2/3rds Congressional vote or by a convention called by Congress on application of 2/3rds of state legislatures. The proposal of the amendment can also be ratified in one of two ways: either ratified by 3/4ths of state ratifying conventions or ratified by 3/4ths of state legislatures.