-4.97% is the change from 866 to 823
Calculation steps:
[( 823 - 866 ) ÷ 866] x 100 = -4.97%
Formula
Percentage change = [(823 - 866) / 866] x 100
Subtract the new number by the original number
823 - 866 = -43
-43 ÷ 866 = -0.049653579676674366
-0.049653579676674366 x 100 = -4.97%