-97.23% is the change from 866 to 24
Calculation steps:
[( 24 - 866 ) ÷ 866] x 100 = -97.23%
Formula
Percentage change = [(24 - 866) / 866] x 100
Subtract the new number by the original number
24 - 866 = -842
-842 ÷ 866 = -0.9722863741339491
-0.9722863741339491 x 100 = -97.23%