OpenType fonts from Adobe that support the "Arbitrary Fractions" OpenType feature can be used in Adobe InDesign CS-CS3, Adobe Illustrator CS-CS3, and Adobe Photoshop CS-CS3 to create properly typeset fractions using any numerals as numerators or denominators.
OpenType fonts from Adobe that include diagonal fractions have an expanded set of the most commonly used diagonal fractions beyond 1/4, 1/2, and 3/4, and may include additional fractions such as 1/8, 3/8, 5/8, 7/8, 1/3, and 2/3. OpenType fonts from Adobe that support diagonal fractions may also support creation of arbitrary fractions that can use any numerals as both numerators and denominators.
Arbitrary fractions are supported in a number of current versions of OpenType fonts from Adobe, including but not limited to Adobe Garamond Pro, Adobe Caslon Pro, Cronos Pro, and Minion Pro.
Some OpenType fonts from Adobe can also support any arbitrary fraction, such as 11/12 or 7,402/12,597. In these cases, designed fractions match the weight of the rest of the font better than fractions which are fauxed by scaling regular-size numbers.
Important Note:You should only apply the fraction feature to the specific text you want to turn into a fraction.Applying the fraction feature to other numbers may result in unexpected effects”either initially, or later if the text is changed to a different font with a different implementation of fractions.
To create arbitrary fractions in InDesign CS and later: