Hi

It's quite difficult to predict as JEE mains qualifying cutoff to be eligible for JEE advanced examination  keeps changing every year depending upon various factors like :-

*number of students that appeared in the  jee main exam,

*kind of marks obtained by them ,

*toughness level of the jee main examination for different shift etc.

But yes,

When we go through previous year trend then yes you  hold a good very chance to qualify JEE main in order to be eligible for JEE advanced

For reference,

JEE mains 2021 expected qualifying  CUT OFF percentile is given below for different categories on the basis of past year trends :

.                  .  JEE      MAIN CUT   OFF    PERCENTILE

Category jeemain2020 jeemain2021 expected off

General :-     90.3765335                 90-95

GEN-EWS :-  70.2435518                  70 -75

OBC-NCL :-  72.8887969                   70 -75

SC     :-           50.1760245                  50 -55

ST :-                39.0696101                  40 - 45

PwD :-            0.0618524                      1- 2

You can check the same at our page the link is provided below

https://engineering.careers360.com/articles/jee-main-cutoff

From above it is clear that, last year qualifying cut off for sc category was 50.1760245 and expected jee main 2021 cut off for sc is 50-55 percentile . So with 66.3 percentile, you hold very good chance to qualify JEE main 2021 to be eligible for JEE advanced examination

To have a personalised report on your chances of getting a college you can go through our college predictor, it will give you complete list of colleges which you can get on the basis of the category you belong to,  your home state, your gender etc, the link for  jee main college predictor is provided below

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

Thankyou