-30.77% is the change from 585 to 405
Calculation steps:
[( 405 - 585 ) ÷ 585] x 100 = -30.77%
Formula
Percentage change = [(405 - 585) / 585] x 100
Subtract the new number by the original number
405 - 585 = -180
-180 ÷ 585 = -0.3076923076923077
-0.3076923076923077 x 100 = -30.77%