I think the following is what I have read, although it also seems that her percent black is even LESS than 1/8th.
If this is incorrect, I am happy to learn the correct situation.
Her Mother: 100% Asian Indian.
Her Father: 75% Caucasian, 25% Black. Family includes Irish Slaveholders in Jamaica. Her grandfather was half white and half black, so he was 50% black. He had Kamala’s father with a white woman, so Kamala’s father was born 75% white and 25% black.
So when Kamala’s father (25% black/75% white) and her mother (100% Asian Indian) had Kamala, half of each is in her make up.
Therefore, Kamala Harris is:
• 50.0% Asian Indian (four-eighths or one-half Asian Indian (4/8 or 1/2));
• 37.5% Caucasian (three-eighths Caucasian); (3/8)
(that adds up to 7/8)
• only 12.5% Black (one-eighth Black) (1/8).