When NOT to Use Hyphens

Hyphens (-) are not used to express a range of values.

Bad Example: from 30-50%

Good Example: from 30 to 50%

(Note that it’s not: from 30% to 50%.)

Of course there are exceptions, as in the case of dates and page numbers:

Good Example: April 29-30, 2010.

Good Example: SPE Reservoir Engineering, Vol. 5, No. 2, pp. 57-63.

Another situation in which we do not use hyphens is a compound modifier when the first word is an adverb that ends in -ly.

Good Example: A well-known man married a full-time employee in an extravagantly decorated hotel ballroom with very rich people attending.

Note that the first two compound modifiers, well-known and full-time, are hyphenated, but the compound modifier with the -ly adverb, extravagantly decorated, is not hyphenated. The same rule applies to the word “very,” as used above.

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