Percentile also commonly called as centile,is a statistical assessment of the percentage of students below and above the level you have scored out of total number of students.A few terms related to percentile are: 25th percentile is first quartile,50th percentile is median or second quartile,75th percentile is third quartile.Percentile can be calculated by the formula:

Percentile of student X = 100-100*(number of aspirants ahead of student X)/ number of total aspirants.