18.44% is the change from 423 to 501
Calculation steps:
[( 501 - 423 ) ÷ 423] x 100 = 18.44%
Formula
Percentage change = [(501 - 423) / 423] x 100
Subtract the new number by the original number
501 - 423 = 78
78 ÷ 423 = 0.18439716312056736
0.18439716312056736 x 100 = 18.44%