-48.59% is the change from 498 to 256
Calculation steps:
[( 256 - 498 ) ÷ 498] x 100 = -48.59%
Formula
Percentage change = [(256 - 498) / 498] x 100
Subtract the new number by the original number
256 - 498 = -242
-242 ÷ 498 = -0.4859437751004016
-0.4859437751004016 x 100 = -48.59%