109.18% is the change from 305 to 638
Calculation steps:
[( 638 - 305 ) ÷ 305] x 100 = 109.18%
Formula
Percentage change = [(638 - 305) / 305] x 100
Subtract the new number by the original number
638 - 305 = 333
333 ÷ 305 = 1.0918032786885246
1.0918032786885246 x 100 = 109.18%