42.08% is the change from 587 to 834
Calculation steps:
[( 834 - 587 ) ÷ 587] x 100 = 42.08%
Formula
Percentage change = [(834 - 587) / 587] x 100
Subtract the new number by the original number
834 - 587 = 247
247 ÷ 587 = 0.42078364565587734
0.42078364565587734 x 100 = 42.08%