Answered By: Katie Hutchison
Last Updated: Aug 24, 2016     Views: 49

In APA format...

Use numerals to express:

   a. numbers 10 and above
      examples: 12 years old, the 57th trial, 12 cm wide

   b. numbers that precede a unit of measurement
      examples: 5-mg dose, 36.3 mm

   c. numbers that represent statistical or mathematical functions, fractional or decimal quantities, percentages, and ratios
      examples: multipled by 5, .33 of the..., more than 5% of the sample..., a ratio of 15:1

   d. numbers that represent time, dates, ages, scores, points on a scale, exact sums of money and numerals
      examples: 1 hr 34 min., at 3:45 am, 2-year olds, score 5 on a 12 point scale

Use numbers expressed as words:

   a. when the number begins a sentence, title, or heading
      examples: Forty-eight percent of the sample..., Twelve students improved...

   b. common fractions
      examples: one fifth of the class..., two-thirds majority

   c. universally accepted language
      examples: the Twelve Apostles, Five Pillars of Islam

For more information, see the Publication Manual of the American Psychological Association.

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