-54.04% is the change from 557 to 256
Calculation steps:
[( 256 - 557 ) ÷ 557] x 100 = -54.04%
Formula
Percentage change = [(256 - 557) / 557] x 100
Subtract the new number by the original number
256 - 557 = -301
-301 ÷ 557 = -0.5403949730700179
-0.5403949730700179 x 100 = -54.04%