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- - Close Hyphenation: Compounding and Word Division
- Introduction to Hyphenation: Compounding and Word Division
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- Any, every, no and some
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2.11 Fractions
Hyphenate fractions used as modifiers and written in full, unless the numerator or denominator already contains a hyphen:
- a one-third share
- twenty-fiftieths calcium
but
- one thirty-second
- twenty-nine fiftieths calcium (In this case numerals are preferable.)
Hyphenate fractions, Exception
one and a half months
Usage is divided on whether fractions used as nouns should be hyphenated. We recommend that the hyphen not be used in such cases:
- Four fifths of the load was wheat, and one fifth barley.
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