-50.35% is the change from 866 to 430
Calculation steps:
[( 430 - 866 ) ÷ 866] x 100 = -50.35%
Formula
Percentage change = [(430 - 866) / 866] x 100
Subtract the new number by the original number
430 - 866 = -436
-436 ÷ 866 = -0.5034642032332564
-0.5034642032332564 x 100 = -50.35%