1. In statistics, a k-th percentile, also known as percentile score or centile, is a score (e.g., a data point) below which a given percentage k of all scores in its frequency distribution exists ("exclusive" definition). Alternatively, it is a score at or below which a given percentage of the all scores exists ("inclusive" definition). I.e., a score in the k-th percentile would be above approximately k% of all scores in its set. For example, under the exclusive definition, the 97th percentile is the value such that 97% of the data points are less than it. Percentiles depends on how scores are arranged. Percentiles are a type of quantiles, obtained by a subdivision into 100 groups. The 25th percentile is also known as the first quartile (Q1), the 50th percentile as the median or second quartile (Q2), and the 75th percentile as the third quartile (Q3). For example, the 50th percentile (median) is the score below (or at or below, depending on the definition) which 50% of the scores in the distribution... from wikipedia.org

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a. Abstract Noun: percentageশতাংশ...