-1.07% is the change from 561 to 555
Calculation steps:
[( 555 - 561 ) ÷ 561] x 100 = -1.07%
Formula
Percentage change = [(555 - 561) / 561] x 100
Subtract the new number by the original number
555 - 561 = -6
-6 ÷ 561 = -0.0106951871657754
-0.0106951871657754 x 100 = -1.07%