About 80% of Ukraine's general population speaks Russia 20 9, 2:03pm

Yeah right, There is huge difference between can speak russian and speak it.
https://uk.m.wikipedia.org/wiki/%D0%A3%D0%BA%D1%80%D0%B0%D1%97%D0%BD%D1%81%D1%8C%D0%BA%D0%B0_%D0%BC%D0%BE%D0%B2%D0%B0_%D0%B2_%D0%A3%D0%BA%D1%80%D0%B0%D1%97%D0%BD%D1%96
Basically 67,5 % consider Ukrainian as their native language, and about similarity, I would say most of the Ukrainian can easily speak Polish which is more similar to Ukrainian.
It's nice to post factCards which are not facts at all.