-10.06% is the change from 646 to 581
Calculation steps:
[( 581 - 646 ) ÷ 646] x 100 = -10.06%
Formula
Percentage change = [(581 - 646) / 646] x 100
Subtract the new number by the original number
581 - 646 = -65
-65 ÷ 646 = -0.10061919504643962
-0.10061919504643962 x 100 = -10.06%