-34.69% is the change from 810 to 529
Calculation steps:
[( 529 - 810 ) ÷ 810] x 100 = -34.69%
Formula
Percentage change = [(529 - 810) / 810] x 100
Subtract the new number by the original number
529 - 810 = -281
-281 ÷ 810 = -0.3469135802469136
-0.3469135802469136 x 100 = -34.69%