From Longman Business Dictionary
percentileper·cen·tile /pəˈsentaɪlpər-/ noun [countableC]STATISTICS one hundredth of a set of things or people, arranged in order on a scaleOur employees’ pay is at the 90th percentile of that offered by similar companies (=it is higher than the pay offered by 90% of similar companies).
→ see also decile, median, quartile