-78.12% is the change from 585 to 128
Calculation steps:
[( 128 - 585 ) ÷ 585] x 100 = -78.12%
Formula
Percentage change = [(128 - 585) / 585] x 100
Subtract the new number by the original number
128 - 585 = -457
-457 ÷ 585 = -0.7811965811965812
-0.7811965811965812 x 100 = -78.12%