The recipe called for one-third of a cup of flour, but I accidentally put in three cups. Why does one-third contain a hyphen in
this sentence? a.to emphasize the mistake that was made
b.to indicate a form of measurement
c.fractions are hyphenated when used as adjectives
d.numbers are always hyphenated
According to the grammar rule regarding numbers, when a compound number is written out, or a fraction is used as an adjective, these should be written using a hyphen between its components. In this case, our support is the latter as <em>one-third</em> is a fraction and not a compound number.
