31.13% is the change from 636 to 834
Calculation steps:
[( 834 - 636 ) ÷ 636] x 100 = 31.13%
Formula
Percentage change = [(834 - 636) / 636] x 100
Subtract the new number by the original number
834 - 636 = 198
198 ÷ 636 = 0.3113207547169811
0.3113207547169811 x 100 = 31.13%