-53.28% is the change from 854 to 399
Calculation steps:
[( 399 - 854 ) ÷ 854] x 100 = -53.28%
Formula
Percentage change = [(399 - 854) / 854] x 100
Subtract the new number by the original number
399 - 854 = -455
-455 ÷ 854 = -0.5327868852459017
-0.5327868852459017 x 100 = -53.28%