-22.91% is the change from 646 to 498
Calculation steps:
[( 498 - 646 ) ÷ 646] x 100 = -22.91%
Formula
Percentage change = [(498 - 646) / 646] x 100
Subtract the new number by the original number
498 - 646 = -148
-148 ÷ 646 = -0.22910216718266255
-0.22910216718266255 x 100 = -22.91%