"If we are compare total class «C» to models Mitsubishi class «C» we are note there were dropped of Mitsubishi more then 80% but car market class «C» dropped on 52 %. But if only foreign car – 75%" I'm afraid it is not correct. You should pay attention to details like these: - "if we are compare", "we are note" - "[be] + [Verb Infinitive]" is always incorrect. - Your use of the word "class" is not right. Why insert "<<C>>" like this which makes it only more difficult to read. - "more then" -> more than. Here's one way to rewrite it: If we compare total car sales to that of Mitsubishi models, we notice there has been a drop of 80 percent in Mitsubish sales as compared with a decline of 52 percent in overall vehicle sales. If we consider foreign cars only, there has been a drop of 75 percent.

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