The percentage of marks and percentile are totally different terms, hence you should not confuse with both the terms.
Percentage is a number out of 100. For instance your total marks in all the subjects divided by maximum possible marks. Your percentage has nothing to do with the performance of other students.
Your Percentile Score in a Board or JEE (Main) reflects how many candidates have scored below you in the Board or JEE(Main) Examination. For example, the 60th Percentile means 60% of students have scored below you.
How To Calculate Percentile
Suppose in a particular Board Examination, number of Candidates Registered are 13,918 and number of Candidates Appeared are 13,711.
Case I: A Candidate who has scored 50% marks in the Board and 2218 candidates have scored below him; his Percentile score will be calculated as (2218 * 100)/13711 = 16.18
Case II: A Candidate who has scored 60% marks in the Board and 6865 candidates have scored below him; his Percentile score will be calculated as (6865 * 100)/13711 = 50.07
Case III: A Candidate who has scored 90% marks in the Board and 13615 candidates have scored below him; his Percentile score will be calculated as (13615 * 100)/13711 = 99.30
The normalized Qualifying examination (12th Board Exam) marks is based on your position in the Board (i.e. your percentile score). The percentile score will mainly contribute to the normalized marks.
If you are willing to appear in the improvement examination to improve the qualifying examination marks, you will have to appear in all the five subjects for improvement. In the percentile system, the total marks of all five subjects obtained in a particular year are required. The marks from two different years (i.e. marks for 3 subjects from year 2012 and marks for other 2 subjects from 2013) mark-sheets cannot be considered for percentile calculation.
The weightage of normalized qualifying examination marks is only for deciding ranking of JEE (Main) which will be used for admission to all Centrally Funded Technical Institutions (CFTIs)/ NITs/IIITs but excluding IITs.
Five subjects are taken into account for calculation of percentile and normalization of qualifying examination marks:
- Any one of Chemistry, Biology, Biotechnology, Technical Vocational Subject
- Any other subject
If you have appeared in six subjects in the qualifying examination, the subject (fifth or sixth) with better marks will be considered.