-56.07% is the change from 585 to 257
Calculation steps:
[( 257 - 585 ) ÷ 585] x 100 = -56.07%
Formula
Percentage change = [(257 - 585) / 585] x 100
Subtract the new number by the original number
257 - 585 = -328
-328 ÷ 585 = -0.5606837606837607
-0.5606837606837607 x 100 = -56.07%