28.72% is the change from 397 to 511
Calculation steps:
[( 511 - 397 ) ÷ 397] x 100 = 28.72%
Formula
Percentage change = [(511 - 397) / 397] x 100
Subtract the new number by the original number
511 - 397 = 114
114 ÷ 397 = 0.2871536523929471
0.2871536523929471 x 100 = 28.72%