-28.38% is the change from 821 to 588
Calculation steps:
[( 588 - 821 ) ÷ 821] x 100 = -28.38%
Formula
Percentage change = [(588 - 821) / 821] x 100
Subtract the new number by the original number
588 - 821 = -233
-233 ÷ 821 = -0.2838002436053593
-0.2838002436053593 x 100 = -28.38%