Vulgar Fraction One Fifth ⅕

The Vulgar Fraction One Fifth character (⅕) is a standard HTML entity defined in the HTML specification. In HTML source code, it can be written using the named entity reference ⅕, the decimal numeric character reference ⅕, or the hexadecimal numeric reference ⅕. The character is assigned Unicode code point U+2155 in the Universal Character Set.

The one-fifth fraction is a precomposed Unicode character displaying ⅕ as a single glyph. Fifth fractions are common in percentage contexts (each fifth = 20%), educational materials, and proportional calculations. HTML5 provides the named entity ⅕ for this character.

Mathematical HTML entities enable web authors to display proper mathematical notation without relying on images or specialized rendering libraries like MathJax or KaTeX. While complex equations and multi-line formulas may still benefit from dedicated math typesetting tools, individual symbols expressed as HTML entities render quickly, remain accessible to screen readers, and can be styled with CSS just like regular text content.

When deciding how to encode the Vulgar Fraction One Fifth character in your HTML documents, the named entity ⅕ is generally the most readable choice for developers reviewing or maintaining source code. The decimal form ⅕ and hexadecimal form ⅕ are equally valid alternatives that work in contexts where named entities may not be supported, or when generating HTML output programmatically from server-side code. All three representations produce identical visual output in every modern web browser.

Use the one-fifth fraction in educational content about fractions, proportional descriptions, and any context where ⅕ appears inline with text. The precomposed character provides better typography than typing 1/5 and ensures consistent rendering across modern browsers.