-34.69% is the change from 813 to 531
Calculation steps:
[( 531 - 813 ) ÷ 813] x 100 = -34.69%
Formula
Percentage change = [(531 - 813) / 813] x 100
Subtract the new number by the original number
531 - 813 = -282
-282 ÷ 813 = -0.34686346863468637
-0.34686346863468637 x 100 = -34.69%