-15.51% is the change from 664 to 561
Calculation steps:
[( 561 - 664 ) ÷ 664] x 100 = -15.51%
Formula
Percentage change = [(561 - 664) / 664] x 100
Subtract the new number by the original number
561 - 664 = -103
-103 ÷ 664 = -0.15512048192771086
-0.15512048192771086 x 100 = -15.51%