A three digit minus the sum of its digits, the difference is still a three digit 38a?

A three digit minus the sum of its digits, the difference is still a three digit 38a?

Let the original three digit number be 100A + 10B + C, then
38A=100a+10b+c-a-b-c=99a+9b
So 38a should be a multiple of 9, so a = 7.9 (11a + b) = 387
So, 11a + B = 43, a = 3 + (10-B) / 11
There is something wrong with your data. According to your data, a = 3, B = 10