-54.2% is the change from 858 to 393
Calculation steps:
[( 393 - 858 ) ÷ 858] x 100 = -54.2%
Formula
Percentage change = [(393 - 858) / 858] x 100
Subtract the new number by the original number
393 - 858 = -465
-465 ÷ 858 = -0.541958041958042
-0.541958041958042 x 100 = -54.2%