U+2151 VULGAR FRACTION ONE NINTH

The Unicode character U+2151, officially named VULGAR FRACTION ONE NINTH, was introduced in Unicode version 5.2. It is part of the Number Forms block, which belongs to the Basic Multilingual plane.

Categorized technically as a Other Number, this character typically falls under the Common script. In terms of text layout and rendering, the glyph is Unknown and has no designated width in East Asian typography. When placed in bidirectional text, it behaves as an Other Neutral character. Its visual representation remains not mirrored regardless of the reading direction.