-14.09% is the change from 646 to 555
Calculation steps:
[( 555 - 646 ) ÷ 646] x 100 = -14.09%
Formula
Percentage change = [(555 - 646) / 646] x 100
Subtract the new number by the original number
555 - 646 = -91
-91 ÷ 646 = -0.14086687306501547
-0.14086687306501547 x 100 = -14.09%