-21.17% is the change from 496 to 391
Calculation steps:
[( 391 - 496 ) ÷ 496] x 100 = -21.17%
Formula
Percentage change = [(391 - 496) / 496] x 100
Subtract the new number by the original number
391 - 496 = -105
-105 ÷ 496 = -0.21169354838709678
-0.21169354838709678 x 100 = -21.17%