40.3% is the change from 397 to 557
Calculation steps:
[( 557 - 397 ) ÷ 397] x 100 = 40.3%
Formula
Percentage change = [(557 - 397) / 397] x 100
Subtract the new number by the original number
557 - 397 = 160
160 ÷ 397 = 0.40302267002518893
0.40302267002518893 x 100 = 40.3%