18.45% is the change from 439 to 520
Calculation steps:
[( 520 - 439 ) ÷ 439] x 100 = 18.45%
Formula
Percentage change = [(520 - 439) / 439] x 100
Subtract the new number by the original number
520 - 439 = 81
81 ÷ 439 = 0.1845102505694761
0.1845102505694761 x 100 = 18.45%