Final answer:
Colonel Tom Parker was Elvis Presley's manager for the majority of his career, earning 25 percent of all his earnings.
Step-by-step explanation:
The manager for the majority of Elvis Presley's career, who earned 25 percent of all his earnings, was Colonel Tom Parker. Parker was a Dutch-American show business manager who guided Presley's career and negotiated his contracts. He played a significant role in shaping Presley's success in the music industry.