6.77% is the change from 399 to 426
Calculation steps:
[( 426 - 399 ) ÷ 399] x 100 = 6.77%
Formula
Percentage change = [(426 - 399) / 399] x 100
Subtract the new number by the original number
426 - 399 = 27
27 ÷ 399 = 0.06766917293233082
0.06766917293233082 x 100 = 6.77%