You cant determine the rank exactly .There will be many engineering institutes that will be taking you in easily . This percentile isnt the final Percentile . The percentile is dependednt on the marks and the number of students that have guven the exam . The number of students that have given the exam on january is approx 9.65 lakhs . The number of students that will be giving the exam in april will change and that will have affect on your percentile . Thus , the percentile will change after the exam of april . Cheers !