4.1. Fraction Slash

The fraction slash is used to form numeric fractions. The standard form of a fraction built using the fraction slash is defined as follows: any sequence of one or more decimal digits, followed by the fraction slash, followed by any sequence of one or more decimal digits. Such a fraction should be displayed as unit, such as 6/8. The precise choice of display can depend on additional formatting information.

If the displaying software is incapable of mapping the fraction to a unit, then it can also be displayed as a simple linear sequence as a fall-back: for example, 6/8. If the fraction is to be separated from a previous number, then a space can be used, choosing the appropriate width (normal, thin, zero-width, and so on). For example, 1 + zero-width space + 6 + fraction slash + 8 displays as 16/8.