Berkeley reports here: https://opa.berkeley.edu/uc-berkeley-fall-enrollment-data-ne...

Asians are 43%-53% depending on how many who identify as 'International' are Asian. Whites are 19.7% and Blacks are 3.4%

You are right, however, about why schools want to eliminate the SAT. SAT optional admissions is a way for schools to admit students whom would have previously been considered unqualified. By increasing the pool of eligible applicants, the school is discriminating against the previous population of qualified, top tier students, which has been historically an Asian majority. Additionally, Asian students with low or no SAT scores will not benefit from these changes because the best Asian students will continue to submit high SAT scores. How many Asian students are going to be accepted without an SAT score when they're being compared to other Asian students with 1500+ SAT scores?