We can start by multiplying $19,200 by 12%. This is 2304. Subtract 19,200 from 2304 and you get 16,896. We could have also received this answer by multiplying by 88%. This would have given us 16,896. So we can use this equation: (((((19,200*88%)88%)88%)88%)88%)=$1011.08.
Hope this helped!