19.15% is the change from 423 to 504
Calculation steps:
[( 504 - 423 ) ÷ 423] x 100 = 19.15%
Formula
Percentage change = [(504 - 423) / 423] x 100
Subtract the new number by the original number
504 - 423 = 81
81 ÷ 423 = 0.19148936170212766
0.19148936170212766 x 100 = 19.15%