39.8% is the change from 397 to 555
Calculation steps:
[( 555 - 397 ) ÷ 397] x 100 = 39.8%
Formula
Percentage change = [(555 - 397) / 397] x 100
Subtract the new number by the original number
555 - 397 = 158
158 ÷ 397 = 0.3979848866498741
0.3979848866498741 x 100 = 39.8%