-48.59% is the change from 496 to 255
Calculation steps:
[( 255 - 496 ) ÷ 496] x 100 = -48.59%
Formula
Percentage change = [(255 - 496) / 496] x 100
Subtract the new number by the original number
255 - 496 = -241
-241 ÷ 496 = -0.48588709677419356
-0.48588709677419356 x 100 = -48.59%