-40.56% is the change from 646 to 384
Calculation steps:
[( 384 - 646 ) ÷ 646] x 100 = -40.56%
Formula
Percentage change = [(384 - 646) / 646] x 100
Subtract the new number by the original number
384 - 646 = -262
-262 ÷ 646 = -0.4055727554179567
-0.4055727554179567 x 100 = -40.56%