32.33% is the change from 399 to 528
Calculation steps:
[( 528 - 399 ) ÷ 399] x 100 = 32.33%
Formula
Percentage change = [(528 - 399) / 399] x 100
Subtract the new number by the original number
528 - 399 = 129
129 ÷ 399 = 0.3233082706766917
0.3233082706766917 x 100 = 32.33%