34.31% is the change from 478 to 642
Calculation steps:
[( 642 - 478 ) ÷ 478] x 100 = 34.31%
Formula
Percentage change = [(642 - 478) / 478] x 100
Subtract the new number by the original number
642 - 478 = 164
164 ÷ 478 = 0.34309623430962344
0.34309623430962344 x 100 = 34.31%