29.94% is the change from 638 to 829
Calculation steps:
[( 829 - 638 ) ÷ 638] x 100 = 29.94%
Formula
Percentage change = [(829 - 638) / 638] x 100
Subtract the new number by the original number
829 - 638 = 191
191 ÷ 638 = 0.2993730407523511
0.2993730407523511 x 100 = 29.94%