90 percent? The Ukrainian and Tatar population of Crimea is about 30 percent, and that doesn't count others who aren't communists or fascists of some kind who want back in with Russia. The 'Russian unity" party, that is now running things, was a fringe party with only 3 elected members until one of their members was made Prime Minister by a group of men carrying grenade launchers who escorted him into the Crimean Rada.
The vote itself was a farce, complete with photos of small children filling out votes, and ballots already filled out with a "yes" for Russia.
By the way, I've noticed your posts pimping for Putin before. This is the low end of propaganda. Are you Russian?
That missing 30% proves the vote was bogus.