-77.95% is the change from 585 to 129
Calculation steps:
[( 129 - 585 ) ÷ 585] x 100 = -77.95%
Formula
Percentage change = [(129 - 585) / 585] x 100
Subtract the new number by the original number
129 - 585 = -456
-456 ÷ 585 = -0.7794871794871795
-0.7794871794871795 x 100 = -77.95%