When to Spell Out Numbers In Sentences
use the numeral with the word percent unless in a technical piece; then use the numeral with the symbol %.
But 7 percent voted no.
Mix a 7% solution with . . . .
spell the number if you spell the currency:
write the numeral if you use the symbol:
NOT add the numeral in parentheses after we have written the number in words (lawyers pay close attention):
seven thousand nine hundred fifty-two (7,952).
NOT use ordinal numbers in dates unless “of” appears between the day and the month:
8 May, or May 8, or the 8th of May
but not May 8th, or 8th May
NOT place an apostrophe before the “s” in a plural year or century:
the 1960s, or the 1800s
NOT capitalize a century:
the twentieth century, or the 20th century.
replace the century with an apostrophe:
the Class of ’64.
Wait, what's happening? That last one apparently has pushed the crowd to the edge of hysteria! Excuse me, I have a crisis on my hands! David, please, drop the hacksaw! Leave your ear alone! I'm finished! You may have your audience back!