19.64% is the change from 555 to 664
Calculation steps:
[( 664 - 555 ) ÷ 555] x 100 = 19.64%
Formula
Percentage change = [(664 - 555) / 555] x 100
Subtract the new number by the original number
664 - 555 = 109
109 ÷ 555 = 0.1963963963963964
0.1963963963963964 x 100 = 19.64%