85.65% is the change from 439 to 815
Calculation steps:
[( 815 - 439 ) ÷ 439] x 100 = 85.65%
Formula
Percentage change = [(815 - 439) / 439] x 100
Subtract the new number by the original number
815 - 439 = 376
376 ÷ 439 = 0.856492027334852
0.856492027334852 x 100 = 85.65%