13.53% is the change from 399 to 453
Calculation steps:
[( 453 - 399 ) ÷ 399] x 100 = 13.53%
Formula
Percentage change = [(453 - 399) / 399] x 100
Subtract the new number by the original number
453 - 399 = 54
54 ÷ 399 = 0.13533834586466165
0.13533834586466165 x 100 = 13.53%