-8.87% is the change from 609 to 555
Calculation steps:
[( 555 - 609 ) ÷ 609] x 100 = -8.87%
Formula
Percentage change = [(555 - 609) / 609] x 100
Subtract the new number by the original number
555 - 609 = -54
-54 ÷ 609 = -0.08866995073891626
-0.08866995073891626 x 100 = -8.87%