11.89% is the change from 555 to 621
Calculation steps:
[( 621 - 555 ) ÷ 555] x 100 = 11.89%
Formula
Percentage change = [(621 - 555) / 555] x 100
Subtract the new number by the original number
621 - 555 = 66
66 ÷ 555 = 0.11891891891891893
0.11891891891891893 x 100 = 11.89%