-22.46% is the change from 641 to 497
Calculation steps:
[( 497 - 641 ) ÷ 641] x 100 = -22.46%
Formula
Percentage change = [(497 - 641) / 641] x 100
Subtract the new number by the original number
497 - 641 = -144
-144 ÷ 641 = -0.22464898595943839
-0.22464898595943839 x 100 = -22.46%