Dear aspirant,

It is not possible to predict how much marks would be required to score above 99 percentile . Yes you can take the help of predictors but these may vary because these kind of things depends on certain factors like difficulty level of the paper,number of candidates appearing for the examination in that particular shift, the quality of candidates appearing in the shifts. Because if lesser intelligent candidates appear in shift 1 then in lesser marks 99 percentile would be scored and vice versa.

But as per my knowledge 99+ would be scored in atleast 215-220 in the 3rd and 4th shifts.

For more information you can check out the link given below-

https://engineering.careers360.com/articles/jee-main-marks-vs-percentile/amp