17.53% is the change from 388 to 456
Calculation steps:
[( 456 - 388 ) ÷ 388] x 100 = 17.53%
Formula
Percentage change = [(456 - 388) / 388] x 100
Subtract the new number by the original number
456 - 388 = 68
68 ÷ 388 = 0.17525773195876287
0.17525773195876287 x 100 = 17.53%