138.01% is the change from 342 to 814
Calculation steps:
[( 814 - 342 ) ÷ 342] x 100 = 138.01%
Formula
Percentage change = [(814 - 342) / 342] x 100
Subtract the new number by the original number
814 - 342 = 472
472 ÷ 342 = 1.3801169590643274
1.3801169590643274 x 100 = 138.01%