-72.91% is the change from 646 to 175
Calculation steps:
[( 175 - 646 ) ÷ 646] x 100 = -72.91%
Formula
Percentage change = [(175 - 646) / 646] x 100
Subtract the new number by the original number
175 - 646 = -471
-471 ÷ 646 = -0.7291021671826625
-0.7291021671826625 x 100 = -72.91%