English
Number Style

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Usage and custom determine whether numbers are expressed in the form of figures or in the form of words. The following guidelines are observed in expressing numbers in written sentences.  (Numbers that appear on business forms — invoices, monthly statements, and purchase orders — are always expressed as figures.)

 

The following is a quick reference chart:

 

Use Words	Use Figures
Numbers ten and under	Numbers 11 and over
Numbers at beginning of sentence	Money
Periods of time	Dates
Ages (note exceptions in 11.01 f)	Addresses and telephone numbers
Fractions	Weights and measurements
	Percentages and decimals