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Hyphens with numbers
Introduction

When whole numbers and fractions are spelled as words, they must often be punctuated with hyphens. Here are some guidelines about when to use hyphens with spelled-out numbers and fractions.

  1. Identify the number being spelled out. Is it between 21 and 99? If so, include a hyphen between the words in the name of the number.

    Example: Seventy six percent of our incoming freshmen are receiving some form of financial aid.

    Revised: Seventy-six percent of our incoming freshmen are receiving some form of financial aid.

  2. If the number is a fraction whose numerator and denominator are both named, use a hyphen between the parts.

    Example: Three quarters of our incoming freshmen are receiving some form of financial aid.

    Revised: Three-quarters of our incoming freshmen are receiving some form of financial aid.

  3. Do not use a hyphen between a fraction used as a noun and a unit of time, distance, or area.

    Example: During the last quarter-century, the number of students receiving financial aid has more than doubled.

    Revised: During the last quarter century, the number of students receiving financial aid has more than doubled.

Remember: Use a hyphen between words for the names of numbers between 21 and 99.



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