-12.01% is the change from 666 to 586
Calculation steps:
[( 586 - 666 ) ÷ 666] x 100 = -12.01%
Formula
Percentage change = [(586 - 666) / 666] x 100
Subtract the new number by the original number
586 - 666 = -80
-80 ÷ 666 = -0.12012012012012012
-0.12012012012012012 x 100 = -12.01%