39.72% is the change from 423 to 591
Calculation steps:
[( 591 - 423 ) ÷ 423] x 100 = 39.72%
Formula
Percentage change = [(591 - 423) / 423] x 100
Subtract the new number by the original number
591 - 423 = 168
168 ÷ 423 = 0.3971631205673759
0.3971631205673759 x 100 = 39.72%