-33.03% is the change from 866 to 580
Calculation steps:
[( 580 - 866 ) ÷ 866] x 100 = -33.03%
Formula
Percentage change = [(580 - 866) / 866] x 100
Subtract the new number by the original number
580 - 866 = -286
-286 ÷ 866 = -0.3302540415704388
-0.3302540415704388 x 100 = -33.03%