-58.1% is the change from 611 to 256
Calculation steps:
[( 256 - 611 ) ÷ 611] x 100 = -58.1%
Formula
Percentage change = [(256 - 611) / 611] x 100
Subtract the new number by the original number
256 - 611 = -355
-355 ÷ 611 = -0.5810147299509002
-0.5810147299509002 x 100 = -58.1%