-32.59% is the change from 580 to 391
Calculation steps:
[( 391 - 580 ) ÷ 580] x 100 = -32.59%
Formula
Percentage change = [(391 - 580) / 580] x 100
Subtract the new number by the original number
391 - 580 = -189
-189 ÷ 580 = -0.3258620689655172
-0.3258620689655172 x 100 = -32.59%