-93.65% is the change from 646 to 41
Calculation steps:
[( 41 - 646 ) ÷ 646] x 100 = -93.65%
Formula
Percentage change = [(41 - 646) / 646] x 100
Subtract the new number by the original number
41 - 646 = -605
-605 ÷ 646 = -0.9365325077399381
-0.9365325077399381 x 100 = -93.65%