Fractions are almost always hyphenated when they are adjectives: “He is one-quarter Irish and three-quarters Nigerian.” But when the numerator is already hyphenated, the fraction itself is not, as in “ninety-nine and forty-four one hundredths.” Fractions treated as nouns are not hyphenated: “He ate one quarter of the ...

Do I hyphenate three-quarters?

Fractions should always be hyphenated when they are adjectives or adverbs, as in They got a one-third share and The money is three-quarters gone. ... One can think of the hyphen as representing the division bar in a fraction in figures. The horse rounded the track five and three-quarters times.

Should written fractions be hyphenated?

Fractions are written out in words. They are hyphenated only when they come right in front of a noun, called a “direct” adjective.