40.9% is the change from 423 to 596
Calculation steps:
[( 596 - 423 ) ÷ 423] x 100 = 40.9%
Formula
Percentage change = [(596 - 423) / 423] x 100
Subtract the new number by the original number
596 - 423 = 173
173 ÷ 423 = 0.408983451536643
0.408983451536643 x 100 = 40.9%