-23.37% is the change from 646 to 495
Calculation steps:
[( 495 - 646 ) ÷ 646] x 100 = -23.37%
Formula
Percentage change = [(495 - 646) / 646] x 100
Subtract the new number by the original number
495 - 646 = -151
-151 ÷ 646 = -0.23374613003095976
-0.23374613003095976 x 100 = -23.37%