129.24% is the change from 342 to 784
Calculation steps:
[( 784 - 342 ) ÷ 342] x 100 = 129.24%
Formula
Percentage change = [(784 - 342) / 342] x 100
Subtract the new number by the original number
784 - 342 = 442
442 ÷ 342 = 1.2923976608187135
1.2923976608187135 x 100 = 129.24%