-27.94% is the change from 866 to 624
Calculation steps:
[( 624 - 866 ) ÷ 866] x 100 = -27.94%
Formula
Percentage change = [(624 - 866) / 866] x 100
Subtract the new number by the original number
624 - 866 = -242
-242 ÷ 866 = -0.279445727482679
-0.279445727482679 x 100 = -27.94%