-51.79% is the change from 531 to 256
Calculation steps:
[( 256 - 531 ) ÷ 531] x 100 = -51.79%
Formula
Percentage change = [(256 - 531) / 531] x 100
Subtract the new number by the original number
256 - 531 = -275
-275 ÷ 531 = -0.5178907721280602
-0.5178907721280602 x 100 = -51.79%