-6.81% is the change from 646 to 602
Calculation steps:
[( 602 - 646 ) ÷ 646] x 100 = -6.81%
Formula
Percentage change = [(602 - 646) / 646] x 100
Subtract the new number by the original number
602 - 646 = -44
-44 ÷ 646 = -0.06811145510835913
-0.06811145510835913 x 100 = -6.81%