Which two groups have to approve of amendments in order for them to be added to the constitution?

It must be approved by the states regardless of how the amendment is proposed. The two following groups have to approve of amendments in order for them to be added to the constitution:

•Three fourth of the state legislatures must approve of the amendment proposed by the congress.

•Three fourth of the states should approve the amendment through approving agreements.

Sorry i don’t know the answer myself