A percentile is called a type of measure which is used in the field of mathematics, especially the branch of statistics, it is used to indicate after a series of data is grouped in an orderly way from lowest to highest, the value of an inconstant below which a percentage figure is located, which results from observations on a set of observations, that is, it is used to compare the results. In other words, it can be said that the percentile is a numerical character between 0 and 100 that is closely related to percentage figures, but is not one of them.
When referring to a specific percentile, this will indicate the value of the variable being studied and which is below the percentage figure that has been provided, for example 30th percentile will be the value that will be given if it is found below 30% of the grouped values you have.
The most common way that is used to perform a percentile calculation is through the following formula, X = n * i / 100. In this formula, the unknown "n" will indicate the number of components in a given sample, while the unknown "i" will indicate the percentile. After said formula is applied and the procedure completed, the result will be the obtaining of a real number with one of its integer parts and another decimal, the decimal is called "D" while the integer part "E".
To better understand what a percentile is, the following example will be given, if having a certain sample which has a large number of values and is divided by 100, it is said that each of these 10 figures is a percentile, being 0 is the lowest percentile value and 100 the one with the highest value.
The most frequent use without any doubt is when it is required to obtain specific data of a certain situation and that can offer much deeper data of a certain population if it is the case.
