I faced a problem. I have prepared a survey document and when I check it online for plagiarism there is zero plagiarism percentage but my instructor told me it has 68% plagiarism. which suggestion do you have for checking my document?
What about asking your instructor how he/she reached the conclusion of plagiarism? There are basically two options, if you wrote everything yourself then the instructors way of checking is wrong on you can make a case that everything is ok. If you copied over parts of the surveyed documents or just reformulated sentences then there really is a problem of taking over the work of others. You should know best how you prepared the document, why performing a plagiarism check yourself?
68% does not sound like an arbitrary number and modern checkers show you a comparison between the tested text and documents found online, so the instructor may be sure about his/her point.
If Your Instructor uses the same anti-plagiarism program, the difference may result from a different interpretation of the results. More advanced anti-plagiarism programs check the document in at least several different aspects and give several quantitative results simultaneously. Perhaps the same results were interpreted differently. However, if Instructor uses a different anti-plagiarism program, the results of the verification may be objectively different, because it may result from different verification algorithms embedded in various anti-plagiarism programs.