-9.02% is the change from 610 to 555
Calculation steps:
[( 555 - 610 ) ÷ 610] x 100 = -9.02%
Formula
Percentage change = [(555 - 610) / 610] x 100
Subtract the new number by the original number
555 - 610 = -55
-55 ÷ 610 = -0.09016393442622951
-0.09016393442622951 x 100 = -9.02%