How do I style a percentage at the start of a sentence?

Since you should never begin a sentence with a numeral, you should first try to reword the sentence. If you find it unwieldy to reorder your words, spell out the number: Seventy-six percent of the class barely passed the final, 18% flunked miserably, and 6% burst into tears. Normally you shouldn’t mix words and numerals, . . .