339.15% is the change from 189 to 830
Calculation steps:
[( 830 - 189 ) ÷ 189] x 100 = 339.15%
Formula
Percentage change = [(830 - 189) / 189] x 100
Subtract the new number by the original number
830 - 189 = 641
641 ÷ 189 = 3.3915343915343916
3.3915343915343916 x 100 = 339.15%