-33.88% is the change from 800 to 529
Calculation steps:
[( 529 - 800 ) ÷ 800] x 100 = -33.88%
Formula
Percentage change = [(529 - 800) / 800] x 100
Subtract the new number by the original number
529 - 800 = -271
-271 ÷ 800 = -0.33875
-0.33875 x 100 = -33.88%