single word requests - a better expression for 'percentage divided by 100'



The function f(a,x) returns the value in the array a specified by x, where x is a percentage of the length of the array, divided by 100.



(i.e. x can be any number between 0 and 1, corresponding to a percentage between 0% and 100%)


Examples: if a = [1,2,3,4,5], then f(a, 0.5) = 3; f(a, 0) = 1; f(a, 1) = 5;


Is there a better way to express that some variable is a 'percentage divided by 100'?


Preferably I am looking for a single word.


Alternatively a phrase, and a single word that can be used later on to reference that phrase.


My first idea was 'fraction', but I am not sure whether that conveys the concept.



Update based on long's answer:


I am looking for a term for the first item in this list:



  • ?, [0-1]

  • ?, [0-10]

  • percent, %, [0-100]

  • per mille 0/00 [0-1000]

  • basis point, permyriad 0/000, [0-10000]




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