He first official czar of russia was frederick william ivan the terrible the sun king zemsky sobor peter the great

The first official Czar of Russia was Ivan the Terrible. Upon reaching adulthood, Ivan was crowned Czar of all Russia (1547). Before him, all rulers of Muscovy were Grand Princes. He was the first to appoint himself Czar "Caesar" (European tradition of "Emperor") whose power comes directly from God. Such a title gave Russia and its ruler significant weight in the eyes of European monarchs. Ivan the Terrible was recognized emperor by Queen Elizabeth I, Holy Roman Emperor Maximilian II and others.

Russian Ivan Grozny (also called Ivan IV) was ruthless. His reign saw the completion of the construction of a centrally administered Russian state and the creation of an empire that included non-Slav states.

- three-quarters or two-thirds..

- "the constitution provides that an amendment may be proposed either by the congress with a two-thirds majority vote in both the house of representatives and the senate or by a constitutional convention called for by two-thirds of the state legislatures."

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can someone just answer this