-13.82% is the change from 644 to 555
Calculation steps:
[( 555 - 644 ) ÷ 644] x 100 = -13.82%
Formula
Percentage change = [(555 - 644) / 644] x 100
Subtract the new number by the original number
555 - 644 = -89
-89 ÷ 644 = -0.13819875776397517
-0.13819875776397517 x 100 = -13.82%