-32.56% is the change from 860 to 580
Calculation steps:
[( 580 - 860 ) ÷ 860] x 100 = -32.56%
Formula
Percentage change = [(580 - 860) / 860] x 100
Subtract the new number by the original number
580 - 860 = -280
-280 ÷ 860 = -0.32558139534883723
-0.32558139534883723 x 100 = -32.56%