-35.01% is the change from 817 to 531
Calculation steps:
[( 531 - 817 ) ÷ 817] x 100 = -35.01%
Formula
Percentage change = [(531 - 817) / 817] x 100
Subtract the new number by the original number
531 - 817 = -286
-286 ÷ 817 = -0.35006119951040393
-0.35006119951040393 x 100 = -35.01%