29.13% is the change from 642 to 829
Calculation steps:
[( 829 - 642 ) ÷ 642] x 100 = 29.13%
Formula
Percentage change = [(829 - 642) / 642] x 100
Subtract the new number by the original number
829 - 642 = 187
187 ÷ 642 = 0.29127725856697817
0.29127725856697817 x 100 = 29.13%