71.65% is the change from 388 to 666
Calculation steps:
[( 666 - 388 ) ÷ 388] x 100 = 71.65%
Formula
Percentage change = [(666 - 388) / 388] x 100
Subtract the new number by the original number
666 - 388 = 278
278 ÷ 388 = 0.7164948453608248
0.7164948453608248 x 100 = 71.65%