-59.02% is the change from 820 to 336
Calculation steps:
[( 336 - 820 ) ÷ 820] x 100 = -59.02%
Formula
Percentage change = [(336 - 820) / 820] x 100
Subtract the new number by the original number
336 - 820 = -484
-484 ÷ 820 = -0.5902439024390244
-0.5902439024390244 x 100 = -59.02%