Hello Aspirant,
Since you have not mentioned your category so considering it as general.
As we go through the latest cut-off of 2019 because till now the cut-offs for 2020 have not been finalized by JAC, then it shows that the closing CRL rank for General category and Outside Delhi quota was 3028 for IT branch in NSUT. Now to secure such rank you should have your JEE-Main 2021 score at least 190 out of 300 and percentile against this is expected to be in the range of 99.6973996511304 - 99.7885790237511.
For complete details about Marks Vs Percentile and Marks Vs Rank kindly check out the links given below :-
https://engineering.careers360.com/articles/jee-main-marks-vs-percentile
https://engineering.careers360.com/articles/jee-main-marks-vs-rank
You can check out the latest cut-offs from the link given below :-
https://engineering.careers360.com/articles/jac-delhi-merit-list
Note that the above prediction is made on the basis of previous year's cut-off and the cut-offs are bound to change every year depending upon various factors such as the number of candidates appearing in an examination, the number of candidates qualifying an examination, difficulty level of the paper, and so on.
To have a list of all those colleges which you can get based upon your score, category, and state you can use JEE-Main College Predictor :-
https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer
As you are preparing for JEE-Main 2021 the I would recommend you to check the resources made by our experts to help aspirants like you in the best and smart preparation of JEE-Main 2021 :-
https://learn.careers360.com/jee-main-coaching/?
I hope this information helps you.
Good Luck!!
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