20.36% is the change from 555 to 668
Calculation steps:
[( 668 - 555 ) ÷ 555] x 100 = 20.36%
Formula
Percentage change = [(668 - 555) / 555] x 100
Subtract the new number by the original number
668 - 555 = 113
113 ÷ 555 = 0.2036036036036036
0.2036036036036036 x 100 = 20.36%