-52.59% is the change from 831 to 394
Calculation steps:
[( 394 - 831 ) ÷ 831] x 100 = -52.59%
Formula
Percentage change = [(394 - 831) / 831] x 100
Subtract the new number by the original number
394 - 831 = -437
-437 ÷ 831 = -0.5258724428399518
-0.5258724428399518 x 100 = -52.59%