I'd guess, much smaller percentage than in Europe, where many neighboring countries speak different languages. Why Russians should study foreign language if they are not going to use that - and that's the case for large percentage of population? It's similar to US in that regard - almost all know English, that's enough at home, and usually enough in neighboring Canada, and the primary foreign language is Spanish, probably because another major neighbour, Mexico, speaks Spanish.
Google Translate is pretty good :) but distinctively worse still than the native tongue.
Russia is very different from US in that it's internal market is not really enough. Many US companies don't bother trading outside the boarders because the cost/benefit is not there.
This is definitely not true in Russia, especially in anything related to software and such (the better paid industries), even Oil requires speaking another language.
It is true that poorer portion of the population don't usually invest much time in other languages, but middle and upper income brackets do.
