34.88% is the change from 258 to 348
Calculation steps:
[( 348 - 258 ) ÷ 258] x 100 = 34.88%
Formula
Percentage change = [(348 - 258) / 258] x 100
Subtract the new number by the original number
348 - 258 = 90
90 ÷ 258 = 0.3488372093023256
0.3488372093023256 x 100 = 34.88%