How does SQLite count the data that meets another condition under the data that has been classified once

Data is a bunch of information about children , I'll count them by race first , Then I will count the number of sick children in each race .
Problem situation ：

I think there is something wrong with the red line above me , But after trying for a long time, I don't know what's wrong .

I hope to achieve the effect like the following , Connect the two columns , Then calculate the ratio .

I hope some students can help solve it , thank you ！

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Take the answer ：

This problem can be solved by case when Write for processing , The specific implementation can refer to the following code ：

select Ethnicity,sum(case when [Class/ASDTraits] = "Yes" then 1 else 0 end ) -- Number of sick children ,count(*)  -- The number of children of all ethnic groups ,sum(case when [Class/ASDTraits] = "Yes" then 1 else 0 end ) /count(*) --- Prevalence rate from ASDgroup by Ethnicity

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