-56.83% is the change from 820 to 354
Calculation steps:
[( 354 - 820 ) ÷ 820] x 100 = -56.83%
Formula
Percentage change = [(354 - 820) / 820] x 100
Subtract the new number by the original number
354 - 820 = -466
-466 ÷ 820 = -0.5682926829268292
-0.5682926829268292 x 100 = -56.83%