28.97% is the change from 397 to 512
Calculation steps:
[( 512 - 397 ) ÷ 397] x 100 = 28.97%
Formula
Percentage change = [(512 - 397) / 397] x 100
Subtract the new number by the original number
512 - 397 = 115
115 ÷ 397 = 0.28967254408060455
0.28967254408060455 x 100 = 28.97%