Final answer:
The main steps to adopt an amendment to the Constitution are proposing and ratifying the amendment. Proposing an amendment requires a two-thirds majority vote in Congress or a convention called by two-thirds of the states. After the proposal, the amendment must be ratified by three-fourths of the state legislatures.
Step-by-step explanation:
Amending the Constitution is a two-step process that involves proposing and ratifying an amendment. The proposal stage requires a two-thirds majority vote in both houses of Congress or a convention called by two-thirds of the states. Once proposed, the amendment must be ratified by three-fourths of the state legislatures. The process is difficult and has only been done 27 times in over two centuries.