Historical Writing Project

Good and Bad Writing -- Exercises in Evaluating Writing Samples

Mechanics -- Fractions

For the most part the same rules apply to fractions as they do to all numbers.  When standing alone, a fraction should be spelled out.
            The army lost three-quarters of its men.

When the fraction is used in a series of numbers, the writer should use numerals.
            The recipe called for 3/4 cup of sugar, 1 cup of flour, and 1/2 teaspoon of salt.

When writing a mixed number, the writer should use numerals.
            The room measured 5½ feet by 3¾ feet.