-56.59% is the change from 820 to 356
Calculation steps:
[( 356 - 820 ) ÷ 820] x 100 = -56.59%
Formula
Percentage change = [(356 - 820) / 820] x 100
Subtract the new number by the original number
356 - 820 = -464
-464 ÷ 820 = -0.5658536585365853
-0.5658536585365853 x 100 = -56.59%