original: Within a decade of its inception, A & M became the world's largest independent record company.
simplifications: In ten years A & M became the world's largest record company. Within a decade, A & M became the largest indie record company. A & M quickly became the world's largest independent record company. Within 10 years of its creation, A & M became the world's largest independent record company. Within a decade of its start, A & M became the world's largest independent record company. Within 10 years of its founding, A&M became the world's largest independent record company. Within 10 years of being created, A & M became the world's largest independent record company. A & M became the world's largest independent record company within a decade of its creation. A & M became the world's largest independent record company  within 10 years of its formation. Within a decade of its beginnings, A&M became the world's largest independent record company.