When you spell out numbers from twenty-one to ninety-nine that consist of more than one word, hyphenate them. For example, write “thirty-six,” not “thirty six.”
But don’t hyphenate terms for larger numbers such as “hundred,” “thousand,” and “million.” For example, write “three thousand four hundred (and) twenty-seven” and “nineteen sixty-eight.” (Such numbers are normally written as numerals anyway: “3,427”; “1968.”)
Our team helps students graduate by offering:
Scribbr specializes in editing study-related documents. We proofread:
Scribbr’s Plagiarism Checker is powered by elements of Turnitin’s Similarity Checker, namely the plagiarism detection software and the Internet Archive and Premium Scholarly Publications content databases.
The add-on AI detector is powered by Scribbr’s proprietary software.
The Scribbr Citation Generator is developed using the open-source Citation Style Language (CSL) project and Frank Bennett’s citeproc-js. It’s the same technology used by dozens of other popular citation tools, including Mendeley and Zotero.
You can find all the citation styles and locales used in the Scribbr Citation Generator in our publicly accessible repository on Github.
