20.14% is the change from 556 to 668
Calculation steps:
[( 668 - 556 ) ÷ 556] x 100 = 20.14%
Formula
Percentage change = [(668 - 556) / 556] x 100
Subtract the new number by the original number
668 - 556 = 112
112 ÷ 556 = 0.2014388489208633
0.2014388489208633 x 100 = 20.14%