28.07% is the change from 399 to 511
Calculation steps:
[( 511 - 399 ) ÷ 399] x 100 = 28.07%
Formula
Percentage change = [(511 - 399) / 399] x 100
Subtract the new number by the original number
511 - 399 = 112
112 ÷ 399 = 0.2807017543859649
0.2807017543859649 x 100 = 28.07%