is it five-and-a-half years or five and a half years
hyphens or not? five-and-a-half yearsor fivc and a half years?
Tolley is right in that one-half always gets a hyphen. Whether other hyphens are added depends upon how the phrase is used (and which style guide you follow).
According the Chicago Manual of Style, age terms (whether adjectives or nouns) are generally always hyphenated, but notes two exceptions as shown below.
A five-and-one-half-year-old, a five-year-old child, but he is five and one-half years old and he is five and one-half years of age.
For most other uses of numbers, Chicago says add hyphens when used as an adjective, but leave open when used as a noun.
Other style manuals may vary.
|link||answered May 15 '12 at 19:29 Jeff Pribyl Grammarly Fellow|
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