306.37% is the change from 157 to 638
Calculation steps:
[( 638 - 157 ) ÷ 157] x 100 = 306.37%
Formula
Percentage change = [(638 - 157) / 157] x 100
Subtract the new number by the original number
638 - 157 = 481
481 ÷ 157 = 3.0636942675159236
3.0636942675159236 x 100 = 306.37%