-93.07% is the change from 823 to 57
Calculation steps:
[( 57 - 823 ) ÷ 823] x 100 = -93.07%
Formula
Percentage change = [(57 - 823) / 823] x 100
Subtract the new number by the original number
57 - 823 = -766
-766 ÷ 823 = -0.9307411907654921
-0.9307411907654921 x 100 = -93.07%