139.47% is the change from 342 to 819
Calculation steps:
[( 819 - 342 ) ÷ 342] x 100 = 139.47%
Formula
Percentage change = [(819 - 342) / 342] x 100
Subtract the new number by the original number
819 - 342 = 477
477 ÷ 342 = 1.394736842105263
1.394736842105263 x 100 = 139.47%