81.05% is the change from 459 to 831
Calculation steps:
[( 831 - 459 ) ÷ 459] x 100 = 81.05%
Formula
Percentage change = [(831 - 459) / 459] x 100
Subtract the new number by the original number
831 - 459 = 372
372 ÷ 459 = 0.8104575163398693
0.8104575163398693 x 100 = 81.05%