-68.73% is the change from 646 to 202
Calculation steps:
[( 202 - 646 ) ÷ 646] x 100 = -68.73%
Formula
Percentage change = [(202 - 646) / 646] x 100
Subtract the new number by the original number
202 - 646 = -444
-444 ÷ 646 = -0.6873065015479877
-0.6873065015479877 x 100 = -68.73%