Sums of money generally take a singular verb. Fifty dollars gets you nowhere today. His resignation was the twenty-first they received. Fifth Avenue Forty-fifth Street Avoid using ordinals in dates, except when styling formal text. Oxford Anthology of English Literature, 1st ed.
Percentages Use numerals to express percentages.
25 percent 1.2 percent Use percent with a numeral. Use the noun percentage when no figure is given. More than 15 percent of the class failed the midterm exam. In nontechnical text, always spell out the word percent . Percentages that act as adjectival compounds before a noun are not hyphenated.