-12.8% is the change from 586 to 511
Calculation steps:
[( 511 - 586 ) ÷ 586] x 100 = -12.8%
Formula
Percentage change = [(511 - 586) / 586] x 100
Subtract the new number by the original number
511 - 586 = -75
-75 ÷ 586 = -0.12798634812286688
-0.12798634812286688 x 100 = -12.8%