10.91% is the change from 550 to 610
Calculation steps:
[( 610 - 550 ) ÷ 550] x 100 = 10.91%
Formula
Percentage change = [(610 - 550) / 550] x 100
Subtract the new number by the original number
610 - 550 = 60
60 ÷ 550 = 0.10909090909090909
0.10909090909090909 x 100 = 10.91%