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Chicago Manual of Style Guidance
When To Spell Out Numbers Using CMOS
A frequent question from writers is how to show numbers in their manuscript. Should the number be spelled out with letters or should digits be used? As with just about everything related to books, The eighteenth edition of The Chicago Manual of Style (CMOS) offers guidance on many different kinds of numbers. Other style manuals have their own guidelines, but this post will focus solely on CMOS. The general rule is that numbers under 101 are written out, like twenty or sevent
Tracy Cutter
Mar 12 min read
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