-55.63% is the change from 577 to 256
Calculation steps:
[( 256 - 577 ) ÷ 577] x 100 = -55.63%
Formula
Percentage change = [(256 - 577) / 577] x 100
Subtract the new number by the original number
256 - 577 = -321
-321 ÷ 577 = -0.5563258232235702
-0.5563258232235702 x 100 = -55.63%