Final answer:
A significant proportion of the converts to Islam in the United States are African-Americans.
Step-by-step explanation:
The significant proportion of converts to Islam in the United States are African-Americans. It is estimated that around 50,000 African-American Muslims belong to the Nation of Islam (NOI), a group that gained prominence during the Civil Rights era under the leadership of Malcom X. Members of the Nation of Islam remain visible in America's largest black communities.