-37.06% is the change from 823 to 518
Calculation steps:
[( 518 - 823 ) ÷ 823] x 100 = -37.06%
Formula
Percentage change = [(518 - 823) / 823] x 100
Subtract the new number by the original number
518 - 823 = -305
-305 ÷ 823 = -0.370595382746051
-0.370595382746051 x 100 = -37.06%