The answer would be 50% of the total number of words in the English vocabulary.
Answer:
Hotel on the Corner of Bitter and Sweet is an historical novel by Jamie Ford. The plot centers around the forced evacuation of Japanese Americans to internment camps; the book depicts the pain and trauma of separation through the friendship of the Chinese-American Henry and his Japanese-American friend Keiko.
0.00658 has 3 significant figures (sig figs), and 5 decimals.
They use it to define African American.