-93.14% is the change from 831 to 57
Calculation steps:
[( 57 - 831 ) ÷ 831] x 100 = -93.14%
Formula
Percentage change = [(57 - 831) / 831] x 100
Subtract the new number by the original number
57 - 831 = -774
-774 ÷ 831 = -0.9314079422382672
-0.9314079422382672 x 100 = -93.14%