-31.95% is the change from 820 to 558
Calculation steps:
[( 558 - 820 ) ÷ 820] x 100 = -31.95%
Formula
Percentage change = [(558 - 820) / 820] x 100
Subtract the new number by the original number
558 - 820 = -262
-262 ÷ 820 = -0.3195121951219512
-0.3195121951219512 x 100 = -31.95%