-59.69% is the change from 635 to 256
Calculation steps:
[( 256 - 635 ) ÷ 635] x 100 = -59.69%
Formula
Percentage change = [(256 - 635) / 635] x 100
Subtract the new number by the original number
256 - 635 = -379
-379 ÷ 635 = -0.5968503937007874
-0.5968503937007874 x 100 = -59.69%