18.26% is the change from 438 to 518
Calculation steps:
[( 518 - 438 ) ÷ 438] x 100 = 18.26%
Formula
Percentage change = [(518 - 438) / 438] x 100
Subtract the new number by the original number
518 - 438 = 80
80 ÷ 438 = 0.182648401826484
0.182648401826484 x 100 = 18.26%