4268.42% is the change from 19 to 830
Calculation steps:
[( 830 - 19 ) ÷ 19] x 100 = 4268.42%
Formula
Percentage change = [(830 - 19) / 19] x 100
Subtract the new number by the original number
830 - 19 = 811
811 ÷ 19 = 42.68421052631579
42.68421052631579 x 100 = 4268.42%