48.83% is the change from 342 to 509
Calculation steps:
[( 509 - 342 ) ÷ 342] x 100 = 48.83%
Formula
Percentage change = [(509 - 342) / 342] x 100
Subtract the new number by the original number
509 - 342 = 167
167 ÷ 342 = 0.48830409356725146
0.48830409356725146 x 100 = 48.83%