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Hyphenating percentages

Is it proper to hyphenate percentages if they’re modifiers? Example - a 20 percent increase. I’m trying to determine this by Associated Press standards.

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AP style doesn't suggest hyphenating percentages and, in fact, suggests keeping hyphenation to a minimum.

With numerals, the AP Style Book editors suggest:

"Use a hyphen to separate figures in odds, ratios, scores some fractions and some vote tabulations...

"..use a hyphen to connect a word ending in -y to another word: twenty-one, fifty-five, etc."

kamjam March 5, 2007, 1:23pm

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