Numbers
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Whereas in scientific and technical writing all numbers are usually as figures, in other academic writing numbers are usually spelled out.  Please follow these guidelines: 


Spell out numbers of one or two words

If a number can be written as one or two words spell it out:

Wrong: The protagonist’s car cost 500 dollars.
Corrected: The protagonist’s car cost five-hundred dollars.

Numbers that cannot be written in one or two words should be converted to figures.

Wrong: The village of Needle has a population of two hundred and thirty-seven.
Corrected: The village of Needle has a population of 237.

Please note that when using a spelled out number from twenty-one to ninety-nine, use a hyphen.

Also note that, if one of several numbers in the same sentence needs to be converted to figures, convert all numbers to figures:

Wrong: Of the 627 students at my high school, only ten came from Asian descent and only twenty-four were Afro-American.
Corrected: Of the 627 students at my high school, only 10 came from Asian descent and only 24 were Afro-American.

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Spell out numbers that begin sentences

When a sentence starts with a number, spell out the number or rewrite the sentence so that the number does not come first:

Wrong: 333 miles is a long way to travel on foot with fifty pounds of luggage.
Corrected: Three hundred and thirty-three miles is a long way to travel on foot with fifty pounds of luggage.

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Use figures instead of words according to standard practice

Date: July 1, 1867
Address: 437 Tweed Road, Watertown, ON
Percentage: 99 percent
Fraction: 3/4
Decimal: .007
Statistics: average age 34
Scores: 14 to 3
Ratio: a ration of 3 to 1
Exact Amount of Money: $13.09
Time of Day: 9:00 P.M.
Division of Book: volume 2, chapter 12, page 321
Division of Play: act 1, scene 4

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