143.44% is the change from 343 to 835
Calculation steps:
[( 835 - 343 ) ÷ 343] x 100 = 143.44%
Formula
Percentage change = [(835 - 343) / 343] x 100
Subtract the new number by the original number
835 - 343 = 492
492 ÷ 343 = 1.434402332361516
1.434402332361516 x 100 = 143.44%