Percent Sign vs. Percent
Whether to use “%” or spell out “percent/per cent” is a house-style decision rather than one universal English rule. Microsoft style uses % with numerals in ordinary cases, while another public-sector style guide prefers words in most prose and reserves % for tables, demonstrating legitimate editorial variation.
Follow the governing style: some guides use % with numerals, while others prefer “percent/per cent” in prose and % mainly in tables.
Key details
Important caveats
Usage Boundary
Do not universalize one organization’s percentage style; be consistent with the publication’s chosen convention and sentence context.
Further guidance
Symbol
Some modern technical/editorial house styles place % directly with a numeral.
Word Form
Other institutional styles prefer the word form in running prose and the symbol in compact tabular contexts.
Sources and evidence
Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.
- percent, percentage — Microsoft Writing Style Guide (opens in a new tab)Microsoft Learn · Microsoft house-style treatment of percent symbol with numerals
- Style guide — percent (opens in a new tab)Renfrewshire Council · Alternative institutional house style using words in prose and percent symbol in tables