7.73% is the change from 388 to 418
Calculation steps:
[( 418 - 388 ) ÷ 388] x 100 = 7.73%
Formula
Percentage change = [(418 - 388) / 388] x 100
Subtract the new number by the original number
418 - 388 = 30
30 ÷ 388 = 0.07731958762886598
0.07731958762886598 x 100 = 7.73%