Write for Business - Blog

UpWrite Press understands the importance of writing skills in business: We're business people just like you. On this blog you'll find tips to improve your writing, along with topics of interest to our staff.

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    Using Punctuation: Commas in Large Numbers

    Monday, January 31, 2011

    Commas are used to separate numerals or "digits" in large numbers. For numbers of four digits or more, place a comma before every third digit, counting from the right.

    This printer costs $3,045.

    Note: It is also acceptable to omit the comma in numbers with only four numerals or "digits."

    Exceptions: Commas are not used in address numbers or in identification numbers.

    12345 Karry Place room 5496
    invoice 17823  

    Note: Spaces, not commas, are used in metric measurements. (This avoids confusion in those countries where commas are used as decimal points.)

    14 267.9 hectares (U.S.A.)
    or 14 267,9 hectares (European)

    For more business-writing tips, browse our blog or use the search box atop the page. Or purchase our handy Proofreader's Guide ebook or Write for Business handbook.