31.44% is the change from 439 to 577
Calculation steps:
[( 577 - 439 ) ÷ 439] x 100 = 31.44%
Formula
Percentage change = [(577 - 439) / 439] x 100
Subtract the new number by the original number
577 - 439 = 138
138 ÷ 439 = 0.3143507972665148
0.3143507972665148 x 100 = 31.44%