-82.35% is the change from 323 to 57
Calculation steps:
[( 57 - 323 ) ÷ 323] x 100 = -82.35%
Formula
Percentage change = [(57 - 323) / 323] x 100
Subtract the new number by the original number
57 - 323 = -266
-266 ÷ 323 = -0.8235294117647058
-0.8235294117647058 x 100 = -82.35%