-53.23% is the change from 866 to 405
Calculation steps:
[( 405 - 866 ) ÷ 866] x 100 = -53.23%
Formula
Percentage change = [(405 - 866) / 866] x 100
Subtract the new number by the original number
405 - 866 = -461
-461 ÷ 866 = -0.5323325635103926
-0.5323325635103926 x 100 = -53.23%