103.09% is the change from 388 to 788
Calculation steps:
[( 788 - 388 ) ÷ 388] x 100 = 103.09%
Formula
Percentage change = [(788 - 388) / 388] x 100
Subtract the new number by the original number
788 - 388 = 400
400 ÷ 388 = 1.0309278350515463
1.0309278350515463 x 100 = 103.09%