-55.71% is the change from 578 to 256
Calculation steps:
[( 256 - 578 ) ÷ 578] x 100 = -55.71%
Formula
Percentage change = [(256 - 578) / 578] x 100
Subtract the new number by the original number
256 - 578 = -322
-322 ÷ 578 = -0.5570934256055363
-0.5570934256055363 x 100 = -55.71%