-52.93% is the change from 820 to 386
Calculation steps:
[( 386 - 820 ) ÷ 820] x 100 = -52.93%
Formula
Percentage change = [(386 - 820) / 820] x 100
Subtract the new number by the original number
386 - 820 = -434
-434 ÷ 820 = -0.5292682926829269
-0.5292682926829269 x 100 = -52.93%