-37.18% is the change from 823 to 517
Calculation steps:
[( 517 - 823 ) ÷ 823] x 100 = -37.18%
Formula
Percentage change = [(517 - 823) / 823] x 100
Subtract the new number by the original number
517 - 823 = -306
-306 ÷ 823 = -0.3718104495747266
-0.3718104495747266 x 100 = -37.18%