21.37% is the change from 393 to 477
Calculation steps:
[( 477 - 393 ) ÷ 393] x 100 = 21.37%
Formula
Percentage change = [(477 - 393) / 393] x 100
Subtract the new number by the original number
477 - 393 = 84
84 ÷ 393 = 0.21374045801526717
0.21374045801526717 x 100 = 21.37%