435.48% is the change from 155 to 830
Calculation steps:
[( 830 - 155 ) ÷ 155] x 100 = 435.48%
Formula
Percentage change = [(830 - 155) / 155] x 100
Subtract the new number by the original number
830 - 155 = 675
675 ÷ 155 = 4.354838709677419
4.354838709677419 x 100 = 435.48%