It seems you are asking about Indian Institute of Engineering, Science and Technology, Shibpur, one of the finest engineering colleges of India. 80 percentile means your expected rank would be around 1,73,802. Now if the number of candidates in September session increases, your rank would also increase. There are certain criteria to apply for a College - if you are applying through Home State quota or All India quota, your category etc. Being a top college of India, the cutoffs are quite high. Going by last few years' cutoffs, if a general category student gets a rank within 8000 or 9000, then you can easily get into CST branch there. If you have home state quota, then a rank within 11,000 can fetch you a seat in CST in IIEST Shibpur. Now you haven't mentioned your category, if you belong to General category, it would be very difficult to get into IIEST with this rank. You can use our College Predictor Tool to know where you have good chances-