341.49% is the change from 188 to 830
Calculation steps:
[( 830 - 188 ) ÷ 188] x 100 = 341.49%
Formula
Percentage change = [(830 - 188) / 188] x 100
Subtract the new number by the original number
830 - 188 = 642
642 ÷ 188 = 3.4148936170212765
3.4148936170212765 x 100 = 341.49%