7.77% is the change from 399 to 430
Calculation steps:
[( 430 - 399 ) ÷ 399] x 100 = 7.77%
Formula
Percentage change = [(430 - 399) / 399] x 100
Subtract the new number by the original number
430 - 399 = 31
31 ÷ 399 = 0.07769423558897243
0.07769423558897243 x 100 = 7.77%