29.75% is the change from 642 to 833
Calculation steps:
[( 833 - 642 ) ÷ 642] x 100 = 29.75%
Formula
Percentage change = [(833 - 642) / 642] x 100
Subtract the new number by the original number
833 - 642 = 191
191 ÷ 642 = 0.29750778816199375
0.29750778816199375 x 100 = 29.75%