33.72% is the change from 258 to 345
Calculation steps:
[( 345 - 258 ) ÷ 258] x 100 = 33.72%
Formula
Percentage change = [(345 - 258) / 258] x 100
Subtract the new number by the original number
345 - 258 = 87
87 ÷ 258 = 0.3372093023255814
0.3372093023255814 x 100 = 33.72%