29.72% is the change from 397 to 515
Calculation steps:
[( 515 - 397 ) ÷ 397] x 100 = 29.72%
Formula
Percentage change = [(515 - 397) / 397] x 100
Subtract the new number by the original number
515 - 397 = 118
118 ÷ 397 = 0.2972292191435768
0.2972292191435768 x 100 = 29.72%