-51.15% is the change from 866 to 423
Calculation steps:
[( 423 - 866 ) ÷ 866] x 100 = -51.15%
Formula
Percentage change = [(423 - 866) / 866] x 100
Subtract the new number by the original number
423 - 866 = -443
-443 ÷ 866 = -0.5115473441108545
-0.5115473441108545 x 100 = -51.15%