-53.81% is the change from 866 to 400
Calculation steps:
[( 400 - 866 ) ÷ 866] x 100 = -53.81%
Formula
Percentage change = [(400 - 866) / 866] x 100
Subtract the new number by the original number
400 - 866 = -466
-466 ÷ 866 = -0.5381062355658198
-0.5381062355658198 x 100 = -53.81%