– For cardinal and ordinal numbers less than 10, spell out the number as in nine people, eight applicants, nine miles, third place.
– For cardinal and ordinal numbers 10 or above, use the figure as in 10 students, 12 people, 15 applicants, 20 miles, 15th place.
– This rule does not apply to these cases: ages, headlines, charts, tables, percentages, money, time, dates, and measurements.
Iran Sentences U.S. Journalist to 8 Years (headline)
$5 billion (money)
A 5-year-old child
Dragoman Style Guide for Figures