20.97% is the change from 391 to 473
Calculation steps:
[( 473 - 391 ) ÷ 391] x 100 = 20.97%
Formula
Percentage change = [(473 - 391) / 391] x 100
Subtract the new number by the original number
473 - 391 = 82
82 ÷ 391 = 0.20971867007672634
0.20971867007672634 x 100 = 20.97%