-22.74% is the change from 642 to 496
Calculation steps:
[( 496 - 642 ) ÷ 642] x 100 = -22.74%
Formula
Percentage change = [(496 - 642) / 642] x 100
Subtract the new number by the original number
496 - 642 = -146
-146 ÷ 642 = -0.22741433021806853
-0.22741433021806853 x 100 = -22.74%