-9.69% is the change from 609 to 550
Calculation steps:
[( 550 - 609 ) ÷ 609] x 100 = -9.69%
Formula
Percentage change = [(550 - 609) / 609] x 100
Subtract the new number by the original number
550 - 609 = -59
-59 ÷ 609 = -0.09688013136288999
-0.09688013136288999 x 100 = -9.69%