-30.37% is the change from 866 to 603
Calculation steps:
[( 603 - 866 ) ÷ 866] x 100 = -30.37%
Formula
Percentage change = [(603 - 866) / 866] x 100
Subtract the new number by the original number
603 - 866 = -263
-263 ÷ 866 = -0.30369515011547343
-0.30369515011547343 x 100 = -30.37%