30.73% is the change from 397 to 519
Calculation steps:
[( 519 - 397 ) ÷ 397] x 100 = 30.73%
Formula
Percentage change = [(519 - 397) / 397] x 100
Subtract the new number by the original number
519 - 397 = 122
122 ÷ 397 = 0.30730478589420657
0.30730478589420657 x 100 = 30.73%