9.91% is the change from 555 to 610
Calculation steps:
[( 610 - 555 ) ÷ 555] x 100 = 9.91%
Formula
Percentage change = [(610 - 555) / 555] x 100
Subtract the new number by the original number
610 - 555 = 55
55 ÷ 555 = 0.0990990990990991
0.0990990990990991 x 100 = 9.91%