-30% is the change from 820 to 574
Calculation steps:
[( 574 - 820 ) ÷ 820] x 100 = -30%
Formula
Percentage change = [(574 - 820) / 820] x 100
Subtract the new number by the original number
574 - 820 = -246
-246 ÷ 820 = -0.3
-0.3 x 100 = -30%
Example