39.83% is the change from 349 to 488
Calculation steps:
[( 488 - 349 ) ÷ 349] x 100 = 39.83%
Formula
Percentage change = [(488 - 349) / 349] x 100
Subtract the new number by the original number
488 - 349 = 139
139 ÷ 349 = 0.3982808022922636
0.3982808022922636 x 100 = 39.83%