72.16% is the change from 388 to 668
Calculation steps:
[( 668 - 388 ) ÷ 388] x 100 = 72.16%
Formula
Percentage change = [(668 - 388) / 388] x 100
Subtract the new number by the original number
668 - 388 = 280
280 ÷ 388 = 0.7216494845360825
0.7216494845360825 x 100 = 72.16%