33.47% is the change from 478 to 638
Calculation steps:
[( 638 - 478 ) ÷ 478] x 100 = 33.47%
Formula
Percentage change = [(638 - 478) / 478] x 100
Subtract the new number by the original number
638 - 478 = 160
160 ÷ 478 = 0.33472803347280333
0.33472803347280333 x 100 = 33.47%