I don’t know where your number is coming from, really.
http://en.ria.ru/russia/20070516/65597324.html
http://www.rferl.org/content/article/1117497.html
http://rbth.com/articles/2010/10/06/russia_cuts_meat_imports05008.html
http://www.photius.com/countries/russia/economy/russia_economy_foreign_trade.html
But I digress. If you search on "Russia imports 40% of its food" you'll see all the articles on it.
You're Welcome