39.95% is the change from 398 to 557
Calculation steps:
[( 557 - 398 ) ÷ 398] x 100 = 39.95%
Formula
Percentage change = [(557 - 398) / 398] x 100
Subtract the new number by the original number
557 - 398 = 159
159 ÷ 398 = 0.39949748743718594
0.39949748743718594 x 100 = 39.95%