-9.17% is the change from 611 to 555
Calculation steps:
[( 555 - 611 ) ÷ 611] x 100 = -9.17%
Formula
Percentage change = [(555 - 611) / 611] x 100
Subtract the new number by the original number
555 - 611 = -56
-56 ÷ 611 = -0.09165302782324058
-0.09165302782324058 x 100 = -9.17%