42.11% is the change from 342 to 486
Calculation steps:
[( 486 - 342 ) ÷ 342] x 100 = 42.11%
Formula
Percentage change = [(486 - 342) / 342] x 100
Subtract the new number by the original number
486 - 342 = 144
144 ÷ 342 = 0.42105263157894735
0.42105263157894735 x 100 = 42.11%