2.27% is the change from 397 to 406
Calculation steps:
[( 406 - 397 ) ÷ 397] x 100 = 2.27%
Formula
Percentage change = [(406 - 397) / 397] x 100
Subtract the new number by the original number
406 - 397 = 9
9 ÷ 397 = 0.022670025188916875
0.022670025188916875 x 100 = 2.27%