34.1% is the change from 478 to 641
Calculation steps:
[( 641 - 478 ) ÷ 478] x 100 = 34.1%
Formula
Percentage change = [(641 - 478) / 478] x 100
Subtract the new number by the original number
641 - 478 = 163
163 ÷ 478 = 0.3410041841004184
0.3410041841004184 x 100 = 34.1%