49.42% is the change from 342 to 511
Calculation steps:
[( 511 - 342 ) ÷ 342] x 100 = 49.42%
Formula
Percentage change = [(511 - 342) / 342] x 100
Subtract the new number by the original number
511 - 342 = 169
169 ÷ 342 = 0.49415204678362573
0.49415204678362573 x 100 = 49.42%