Hello Aspirant,

See your NTA score is nothing but your percentile, so if your NTA score is 28.88 then your percentile is also 28.88 and If we go through the analysis of marks Vs Percentile Vs rank for JEE-Main 2020 then according to the percentile mentioned by you in the question your rank is expected to be in the range of 727558 - 817880 for 28.88 and 522958 - 587880 for 48.88, you can check out marks Vs ranks Vs Percentile from the link given below :-

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

Or

You can also use JEE-Main Rank Predictor to predict your rank :-

Note that the rank which is predicted is only the expected rank on the basis of previous year's data so your actual rank might vary depending upon current factors. To give you an idea of your approximate rank we have provided the expected range of rank.

To have a list of all those colleges which you can get based upon your marks, category, and state you can use JEE-Main College Predictor:-

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

If you are preparing for JEE-Main 2021 or 2022 then 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 or 2022 :-

https://learn.careers360.com/jee-main-coaching/?utm_source=%20QnA

I hope this information helps you.

Good Luck!!