-35.49% is the change from 820 to 529
Calculation steps:
[( 529 - 820 ) ÷ 820] x 100 = -35.49%
Formula
Percentage change = [(529 - 820) / 820] x 100
Subtract the new number by the original number
529 - 820 = -291
-291 ÷ 820 = -0.3548780487804878
-0.3548780487804878 x 100 = -35.49%