65.72% is the change from 388 to 643
Calculation steps:
[( 643 - 388 ) ÷ 388] x 100 = 65.72%
Formula
Percentage change = [(643 - 388) / 388] x 100
Subtract the new number by the original number
643 - 388 = 255
255 ÷ 388 = 0.6572164948453608
0.6572164948453608 x 100 = 65.72%