Identify the sentence in which the underlined word or words are punctuated INCORRECTLY.

A. Jed is an all American player on the football team.
B. Despite his talent, he is not self-centered.
C. He is captain-elect of his college team.
D. He had a two-thirds majority of the votes.

D. He had a two-thirds majority of the votes. (No punctuation is needed between "two-thirds" and "majority.")