-93.04% is the change from 819 to 57
Calculation steps:
[( 57 - 819 ) ÷ 819] x 100 = -93.04%
Formula
Percentage change = [(57 - 819) / 819] x 100
Subtract the new number by the original number
57 - 819 = -762
-762 ÷ 819 = -0.9304029304029304
-0.9304029304029304 x 100 = -93.04%