21.05% is the change from 399 to 483
Calculation steps:
[( 483 - 399 ) ÷ 399] x 100 = 21.05%
Formula
Percentage change = [(483 - 399) / 399] x 100
Subtract the new number by the original number
483 - 399 = 84
84 ÷ 399 = 0.21052631578947367
0.21052631578947367 x 100 = 21.05%