34.11% is the change from 258 to 346
Calculation steps:
[( 346 - 258 ) ÷ 258] x 100 = 34.11%
Formula
Percentage change = [(346 - 258) / 258] x 100
Subtract the new number by the original number
346 - 258 = 88
88 ÷ 258 = 0.34108527131782945
0.34108527131782945 x 100 = 34.11%