-30.12% is the change from 820 to 573
Calculation steps:
[( 573 - 820 ) ÷ 820] x 100 = -30.12%
Formula
Percentage change = [(573 - 820) / 820] x 100
Subtract the new number by the original number
573 - 820 = -247
-247 ÷ 820 = -0.30121951219512194
-0.30121951219512194 x 100 = -30.12%