-22.43% is the change from 642 to 498
Calculation steps:
[( 498 - 642 ) ÷ 642] x 100 = -22.43%
Formula
Percentage change = [(498 - 642) / 642] x 100
Subtract the new number by the original number
498 - 642 = -144
-144 ÷ 642 = -0.22429906542056074
-0.22429906542056074 x 100 = -22.43%