32.56% is the change from 258 to 342
Calculation steps:
[( 342 - 258 ) ÷ 258] x 100 = 32.56%
Formula
Percentage change = [(342 - 258) / 258] x 100
Subtract the new number by the original number
342 - 258 = 84
84 ÷ 258 = 0.32558139534883723
0.32558139534883723 x 100 = 32.56%