4.51% is the change from 399 to 417
Calculation steps:
[( 417 - 399 ) ÷ 399] x 100 = 4.51%
Formula
Percentage change = [(417 - 399) / 399] x 100
Subtract the new number by the original number
417 - 399 = 18
18 ÷ 399 = 0.045112781954887216
0.045112781954887216 x 100 = 4.51%