-13.16% is the change from 646 to 561
Calculation steps:
[( 561 - 646 ) ÷ 646] x 100 = -13.16%
Formula
Percentage change = [(561 - 646) / 646] x 100
Subtract the new number by the original number
561 - 646 = -85
-85 ÷ 646 = -0.13157894736842105
-0.13157894736842105 x 100 = -13.16%