342.11% is the change from 19 to 84
Calculation steps:
[( 84 - 19 ) ÷ 19] x 100 = 342.11%
Formula
Percentage change = [(84 - 19) / 19] x 100
Subtract the new number by the original number
84 - 19 = 65
65 ÷ 19 = 3.4210526315789473
3.4210526315789473 x 100 = 342.11%