1% is the change from 399 to 403
Calculation steps:
[( 403 - 399 ) ÷ 399] x 100 = 1%
Formula
Percentage change = [(403 - 399) / 399] x 100
Subtract the new number by the original number
403 - 399 = 4
4 ÷ 399 = 0.010025062656641603
0.010025062656641603 x 100 = 1%