27.96% is the change from 397 to 508
Calculation steps:
[( 508 - 397 ) ÷ 397] x 100 = 27.96%
Formula
Percentage change = [(508 - 397) / 397] x 100
Subtract the new number by the original number
508 - 397 = 111
111 ÷ 397 = 0.2795969773299748
0.2795969773299748 x 100 = 27.96%