27% is the change from 400 to 508
Calculation steps:
[( 508 - 400 ) ÷ 400] x 100 = 27%
Formula
Percentage change = [(508 - 400) / 400] x 100
Subtract the new number by the original number
508 - 400 = 108
108 ÷ 400 = 0.27
0.27 x 100 = 27%
Example