311.61% is the change from 155 to 638
Calculation steps:
[( 638 - 155 ) ÷ 155] x 100 = 311.61%
Formula
Percentage change = [(638 - 155) / 155] x 100
Subtract the new number by the original number
638 - 155 = 483
483 ÷ 155 = 3.1161290322580646
3.1161290322580646 x 100 = 311.61%