# Is it redundant to say "percentage of one hundred"?

I have seen the word "percentage" defined as "a number or rate that is expressed as a certain number of parts of something divided into 100 parts". It seems to follow that 50% means "50 parts of something which is divided into 100 parts". Does the word percentage implies that the whole is 100? Am I being redundant if I use the phrase "percentage of one hundred"?

Context: I am trying to state explicitly that a number provided to my software should be in the form of "50" for 50%, not "0.50" (which, to be consistent, I would refer to as a percentage of one). My usage is as follows:

Provide the minimum discount given to this customer as a percentage of one hundred (15 for 15%).

• percent comes from the Italian: per cento. x number for every one hundred, right. In your context, I would say: as a percentage. Percentage is by definition "of one hundred". So percentage of one hundred is redundant. Dec 18, 2017 at 18:03
• "Percentage of one hundred" is redundant; there is no other kind of percentage. "percentage of one" is meaningless. In the context of your program, I can tell you from experience that you need to carefully validate your input here, and also provide clear instruction - as per YLearn's answer Dec 19, 2017 at 0:57