-16.27% is the change from 664 to 556
Calculation steps:
[( 556 - 664 ) ÷ 664] x 100 = -16.27%
Formula
Percentage change = [(556 - 664) / 664] x 100
Subtract the new number by the original number
556 - 664 = -108
-108 ÷ 664 = -0.16265060240963855
-0.16265060240963855 x 100 = -16.27%