U+2151 "⅑" Vulgar Fraction One Ninth Unicode Character
Unicode Version 17.0
⅑
U+2151 "⅑" Vulgar Fraction One Ninth is a precomposed typographic symbol representing the fraction one ninth in a single glyph, designed for use in mathematical notation, recipes, measurements, and other contexts where space efficiency or consistent formatting is desired. It belongs to the Number Forms block of the Unicode standard and is typically rendered as a smaller numeral one placed above a smaller numeral nine, separated by a horizontal line, allowing it to be displayed cleanly in digital text without requiring specialized markup or fonts.
General Properties
| Code Point | U+2151 |
| Version Added | 5.2 |
| Name | Vulgar Fraction One Ninth |
| Block | Number Forms |
| General Category | Other Number |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Other Neutral |
| Decomposition Type | Fraction |
| Decomposition Mapping | "1" U+0031 Digit One "⁄" U+2044 Fraction Slash "9" U+0039 Digit Nine |
Encodings
| HTML Decimal Encoding | ⅑ |
| HTML Hex Encoding | ⅑ |
| UTF-8 Encoding | 0xE2 0x85 0x91 |
| UTF-16 Encoding | 0x2151 |
| UTF-32 Encoding | 0x00002151 |
| C/C++/Java Escape | \u2151 |
Unicode Properties
| NFC Quick Check | Yes |
| NFD Quick Check | Yes |
| Numeric Type | Numeric |
| Numeric Value | 1/9 |
| Line Break | Ambiguous (Alphabetic or Ideographic) |
| Changes When NFKC Casefolded | Yes |
| NFKC Casefold | "1" U+0031 Digit One "⁄" U+2044 Fraction Slash "9" U+0039 Digit Nine |
| NFKC Simple Casefold | "1" U+0031 Digit One "⁄" U+2044 Fraction Slash "9" U+0039 Digit Nine |
| Script | Common |
| Script Extensions | Common |
| Indic Syllabic Category | Other |
| Vertical Orientation | Upright |
| Grapheme Base | Yes |
| Grapheme Cluster Break | Other |
| Word Break | Other |
| Sentence Break | Other |