-53.41% is the change from 850 to 396
Calculation steps:
[( 396 - 850 ) ÷ 850] x 100 = -53.41%
Formula
Percentage change = [(396 - 850) / 850] x 100
Subtract the new number by the original number
396 - 850 = -454
-454 ÷ 850 = -0.5341176470588235
-0.5341176470588235 x 100 = -53.41%