81.7% is the change from 459 to 834
Calculation steps:
[( 834 - 459 ) ÷ 459] x 100 = 81.7%
Formula
Percentage change = [(834 - 459) / 459] x 100
Subtract the new number by the original number
834 - 459 = 375
375 ÷ 459 = 0.8169934640522876
0.8169934640522876 x 100 = 81.7%