107.14% is the change from 308 to 638
Calculation steps:
[( 638 - 308 ) ÷ 308] x 100 = 107.14%
Formula
Percentage change = [(638 - 308) / 308] x 100
Subtract the new number by the original number
638 - 308 = 330
330 ÷ 308 = 1.0714285714285714
1.0714285714285714 x 100 = 107.14%