-11.9% is the change from 580 to 511
Calculation steps:
[( 511 - 580 ) ÷ 580] x 100 = -11.9%
Formula
Percentage change = [(511 - 580) / 580] x 100
Subtract the new number by the original number
511 - 580 = -69
-69 ÷ 580 = -0.11896551724137931
-0.11896551724137931 x 100 = -11.9%