-28.41% is the change from 820 to 587
Calculation steps:
[( 587 - 820 ) ÷ 820] x 100 = -28.41%
Formula
Percentage change = [(587 - 820) / 820] x 100
Subtract the new number by the original number
587 - 820 = -233
-233 ÷ 820 = -0.2841463414634146
-0.2841463414634146 x 100 = -28.41%