18.8% is the change from 399 to 474
Calculation steps:
[( 474 - 399 ) ÷ 399] x 100 = 18.8%
Formula
Percentage change = [(474 - 399) / 399] x 100
Subtract the new number by the original number
474 - 399 = 75
75 ÷ 399 = 0.18796992481203006
0.18796992481203006 x 100 = 18.8%