-36.27% is the change from 830 to 529
Calculation steps:
[( 529 - 830 ) ÷ 830] x 100 = -36.27%
Formula
Percentage change = [(529 - 830) / 830] x 100
Subtract the new number by the original number
529 - 830 = -301
-301 ÷ 830 = -0.36265060240963853
-0.36265060240963853 x 100 = -36.27%