After congress has approved a proposed amendment to the constitution, what then must take place before that amendment becomes law? the president must approve it. three-quarters of the states must approve it. the supreme court must approve it. half of the states must approve it.

Three-quarters of the states must approve it.

Explanation:

Amendment to the constitution will heavily influenced the type of laws that can be passed by the states (since they are not allowed to contradict the laws from the constitution.)

Because of this, the amendment will require the approval of the large majority of the states to maintain the stability of the government on local levels.

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