29.4% is the change from 398 to 515
Calculation steps:
[( 515 - 398 ) ÷ 398] x 100 = 29.4%
Formula
Percentage change = [(515 - 398) / 398] x 100
Subtract the new number by the original number
515 - 398 = 117
117 ÷ 398 = 0.29396984924623115
0.29396984924623115 x 100 = 29.4%