name for a rational number between zero and one? I'm searching for a unified name to convey for the concept that a number will always be between zero and one.
Some info for context:
in probability we've got a number between 0 and 1.  Percentages appear to be similar in that we've got a number between zero and one, but it is multiplied by one hundred.
The nearest names that I've got so far are "factor" or "coefficient", but both of these names could be larger than 1, or smaller than zero.

Since the mantissa of a logarithm is a value between 0 and 1 (I'm just barely old enough to have used logarithm tables instead of calculators in high school) I thought maybe googling "mantissa" might suggest something (and if not, I was still going to suggest something like "a mantissa number" for a number between 0 and 1), and when I googled, I immediately found the following at Wolfram's Mathworld site:
http://mathworld.wolfram.com/Mantissa.html
