-48.19% is the change from 496 to 257
Calculation steps:
[( 257 - 496 ) ÷ 496] x 100 = -48.19%
Formula
Percentage change = [(257 - 496) / 496] x 100
Subtract the new number by the original number
257 - 496 = -239
-239 ÷ 496 = -0.48185483870967744
-0.48185483870967744 x 100 = -48.19%