Answer:
Had more than doubled since 1900.
Explanation:
The African-American population in the Midwest and Northeast was 500,000 people in 1900, and it gradually grew to 1,250,000 inhabitants by 1930. Therefore, to determine the percentage by which this population increased, the following mathematical calculation must be performed:
500,000 = 100
1,250,000 = X
1,250,000 x 100 / 500,000 = X
125,000,000 / 500,000 = X
250 = X
250/100 = 2.5
Thus, the Afro-American population in these regions multiplied by 2.5, that is, more than doubled during that period of time.
